android: daily traffic history and the statistics screen as in the Final 2026 mockup; today's traffic on Home and the widget

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/frontends/android/app/src/main/AndroidManifest.xml

@@ -79,6 +79,9 @@
                 <action android:name="android.service.quicksettings.action.QS_TILE_PREFERENCES" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ui.StatsActivity"
+            android:exported="false" />
         <activity
             android:name=".ui.BatteryActivity"
             android:exported="false" />

src/frontends/android/app/src/main/java/org/strongswan/android/logic/CharonVpnService.java

@@ -57,6 +57,7 @@ import org.strongswan.android.data.VpnType.VpnTypeFeature;
 import org.strongswan.android.logic.VpnStateService.ErrorState;
 import org.strongswan.android.logic.VpnStateService.State;
 import org.strongswan.android.logic.imc.ImcState;
+import org.strongswan.android.logic.stats.TrafficHistory;
 import org.strongswan.android.logic.imc.RemediationInstruction;
 import org.strongswan.android.logic.routing.RouteCheck;
 import org.strongswan.android.logic.routing.RoutingManager;
@@ -919,6 +920,15 @@ public class CharonVpnService extends VpnService implements Runnable, VpnStateSe
 	 */
 	private void setState(State state)
 	{
+		/* the daily traffic history samples the counters while the tunnel is up */
+		if (state == State.CONNECTED)
+		{
+			TrafficHistory.start(this);
+		}
+		else
+		{
+			TrafficHistory.stop(this);
+		}
 		synchronized (mServiceLock)
 		{
 			if (mService != null)

src/frontends/android/app/src/main/java/org/strongswan/android/logic/stats/TrafficHistory.kt

@@ -0,0 +1,214 @@
+/*
+ * Copyright (C) 2026 SHX VPN
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+package org.strongswan.android.logic.stats
+
+import android.content.Context
+import android.util.Log
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import org.json.JSONArray
+import org.json.JSONObject
+import org.strongswan.android.logic.CharonVpnService
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Locale
+import java.util.concurrent.Executors
+import java.util.concurrent.ScheduledFuture
+import java.util.concurrent.TimeUnit
+
+/** Bytes of one day: through the tunnel and straight past it (userspace router). */
+data class DayTraffic(val day: String, val vpn: Long, val direct: Long)
+{
+	val total: Long get() = vpn + direct
+}
+
+/**
+ * Daily traffic history (F_Stats).  While the tunnel is up the daemon
+ * counters are sampled every [SAMPLE_S] seconds and the growth is added to
+ * the current day; the counters restart with every connection, so a drop
+ * starts a new baseline.  Kept for [KEEP_DAYS] days in traffic.json.
+ */
+object TrafficHistory
+{
+	private const val TAG = "TrafficHistory"
+	private const val FILE_NAME = "traffic.json"
+	private const val SAMPLE_S = 15L
+	private const val KEEP_DAYS = 120
+
+	private val executor = Executors.newSingleThreadScheduledExecutor()
+	private var task: ScheduledFuture<*>? = null
+	private var lastVpn = -1L
+	private var lastDirect = -1L
+	@Volatile private var loaded = false
+	private val days = LinkedHashMap<String, LongArray>()
+	private var firstDay: String? = null
+
+	private val _changes = MutableStateFlow(0L)
+	/** Bumps whenever a sample changed the history (for live screens). */
+	val changes: StateFlow<Long> = _changes
+
+	internal fun dayKey(ms: Long): String = SimpleDateFormat("yyyy-MM-dd", Locale.US).format(ms)
+
+	/** Starts sampling (the tunnel came up); harmless when already running. */
+	@JvmStatic
+	@Synchronized
+	fun start(context: Context)
+	{
+		val app = context.applicationContext
+		if (task != null)
+		{
+			return
+		}
+		lastVpn = -1L
+		lastDirect = -1L
+		task = executor.scheduleWithFixedDelay({ sample(app) }, 0, SAMPLE_S, TimeUnit.SECONDS)
+	}
+
+	/** Stops sampling after a last sample (the tunnel goes down). */
+	@JvmStatic
+	@Synchronized
+	fun stop(context: Context)
+	{
+		val app = context.applicationContext
+		val running = task ?: return
+		running.cancel(false)
+		task = null
+		executor.execute { sample(app) }
+	}
+
+	private fun sample(context: Context)
+	{
+		val traffic = runCatching { CharonVpnService.queryTraffic() }.getOrNull()
+		val vpn = traffic?.let { it.getOrElse(0) { 0L } + it.getOrElse(1) { 0L } } ?: return
+		/* direct bytes only exist with the userspace router (s[3]) */
+		val direct = runCatching { CharonVpnService.getRoutingStats() }.getOrNull()?.takeIf { it.size >= 4 }?.get(3) ?: 0L
+		val dVpn = if (lastVpn < 0 || vpn < lastVpn) 0L else vpn - lastVpn
+		val dDirect = if (lastDirect < 0 || direct < lastDirect) 0L else direct - lastDirect
+		/* a new session: count what it already did since its counters started */
+		val addVpn = if (lastVpn >= 0 && vpn < lastVpn) vpn else dVpn
+		val addDirect = if (lastDirect >= 0 && direct < lastDirect) direct else dDirect
+		lastVpn = vpn
+		lastDirect = direct
+		if (addVpn > 0 || addDirect > 0)
+		{
+			add(context, System.currentTimeMillis(), addVpn, addDirect)
+		}
+	}
+
+	@Synchronized
+	internal fun add(context: Context, at: Long, vpn: Long, direct: Long)
+	{
+		load(context)
+		val key = dayKey(at)
+		val row = days.getOrPut(key) { LongArray(2) }
+		row[0] += vpn
+		row[1] += direct
+		if (firstDay == null)
+		{
+			firstDay = key
+		}
+		prune()
+		save(context)
+		_changes.value = System.currentTimeMillis()
+		org.strongswan.android.ui.widget.ShxWidgetState.refresh(context)
+	}
+
+	/** The days from [from] to [to] (inclusive, wall clock), zeros where nothing was recorded. */
+	@Synchronized
+	fun range(context: Context, from: Long, to: Long): List<DayTraffic>
+	{
+		load(context)
+		val result = ArrayList<DayTraffic>()
+		val c = Calendar.getInstance()
+		c.timeInMillis = from
+		while (c.timeInMillis <= to)
+		{
+			val key = dayKey(c.timeInMillis)
+			val row = days[key]
+			result += DayTraffic(key, row?.get(0) ?: 0L, row?.get(1) ?: 0L)
+			c.add(Calendar.DAY_OF_YEAR, 1)
+		}
+		return result
+	}
+
+	@Synchronized
+	fun today(context: Context): DayTraffic = range(context, System.currentTimeMillis(), System.currentTimeMillis()).first()
+
+	/** First day with any record, null before the first connection. */
+	@Synchronized
+	fun firstDay(context: Context): String?
+	{
+		load(context)
+		return firstDay
+	}
+
+	private fun prune()
+	{
+		val cutoff = dayKey(System.currentTimeMillis() - KEEP_DAYS * 24L * 60 * 60 * 1000)
+		days.keys.filter { it < cutoff }.forEach { days.remove(it) }
+	}
+
+	private fun load(context: Context)
+	{
+		if (loaded)
+		{
+			return
+		}
+		loaded = true
+		try
+		{
+			val file = File(context.filesDir, FILE_NAME)
+			if (!file.exists())
+			{
+				return
+			}
+			val json = JSONObject(file.readText())
+			firstDay = json.optString("first").ifEmpty { null }
+			val array = json.optJSONArray("days") ?: JSONArray()
+			for (i in 0 until array.length())
+			{
+				val o = array.getJSONObject(i)
+				days[o.getString("d")] = longArrayOf(o.optLong("v"), o.optLong("r"))
+			}
+		}
+		catch (e: Exception)
+		{
+			Log.w(TAG, "Loading the traffic history failed", e)
+		}
+	}
+
+	private fun save(context: Context)
+	{
+		try
+		{
+			val array = JSONArray()
+			days.toSortedMap().forEach { (d, row) -> array.put(JSONObject().put("d", d).put("v", row[0]).put("r", row[1])) }
+			val json = JSONObject().put("first", firstDay ?: JSONObject.NULL).put("days", array)
+			val file = File(context.filesDir, FILE_NAME)
+			val tmp = File(file.path + ".tmp")
+			tmp.writeText(json.toString())
+			if (!tmp.renameTo(file))
+			{
+				file.writeText(json.toString())
+				tmp.delete()
+			}
+		}
+		catch (e: Exception)
+		{
+			Log.w(TAG, "Saving the traffic history failed", e)
+		}
+	}
+}

src/frontends/android/app/src/main/java/org/strongswan/android/ui/StatsActivity.kt

@@ -0,0 +1,370 @@
+/*
+ * Copyright (C) 2026 SHX VPN
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+package org.strongswan.android.ui
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.provider.Settings
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.wrapContentWidth
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.Icon
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.produceState
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.draw.drawBehind
+import androidx.compose.ui.geometry.CornerRadius
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.PathEffect
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.semantics.Role
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.core.graphics.drawable.toBitmap
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.strongswan.android.R
+import org.strongswan.android.logic.routing.AppTraffic
+import org.strongswan.android.logic.routing.RoutingManager
+import org.strongswan.android.logic.stats.DayTraffic
+import org.strongswan.android.logic.stats.TrafficHistory
+import org.strongswan.android.ui.compose.SecondaryScaffold
+import org.strongswan.android.ui.compose.design.ShxIcons
+import org.strongswan.android.ui.compose.design.ShxTabs
+import org.strongswan.android.ui.compose.formatBytes
+import org.strongswan.android.ui.compose.theme.LocalShxColors
+import org.strongswan.android.ui.compose.theme.ShxTheme
+import org.strongswan.android.ui.compose.theme.ShxType
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Locale
+
+/** «Statistics» (F_Stats / F_StatsEmpty): traffic per day, VPN vs direct, top apps. */
+class StatsActivity : AppCompatActivity()
+{
+	override fun onCreate(savedInstanceState: Bundle?)
+	{
+		super.onCreate(savedInstanceState)
+		enableEdgeToEdge()
+		setContent {
+			ShxTheme {
+				StatsScreen(onBack = { finish() })
+			}
+		}
+	}
+}
+
+private enum class Period(val label: Int) { DAY(R.string.stats_day), WEEK(R.string.stats_week), MONTH(R.string.stats_month) }
+
+/** One app row: label, icon, bytes and whether it goes direct. */
+private class AppRow(val label: String, val icon: android.graphics.drawable.Drawable?, val bytes: Long, val direct: Boolean)
+
+private class StatsData(val days: List<DayTraffic>, val title: String, val labels: List<String>, val highlight: Int, val first: String?, val apps: List<AppRow>, val usage: Boolean)
+
+private fun startOfDay(ms: Long): Long = Calendar.getInstance().apply {
+	timeInMillis = ms; set(Calendar.HOUR_OF_DAY, 0); set(Calendar.MINUTE, 0); set(Calendar.SECOND, 0); set(Calendar.MILLISECOND, 0)
+}.timeInMillis
+
+private fun load(context: Context, period: Period): StatsData
+{
+	val now = System.currentTimeMillis()
+	val day = 24L * 60 * 60 * 1000
+	val cal = Calendar.getInstance()
+	val (from, to) = when (period)
+	{
+		/* the day view still shows the last week, today highlighted */
+		Period.DAY -> startOfDay(now) - 6 * day to now
+		Period.WEEK ->
+		{
+			cal.timeInMillis = startOfDay(now)
+			cal.firstDayOfWeek = Calendar.MONDAY
+			cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY)
+			if (cal.timeInMillis > now) cal.add(Calendar.WEEK_OF_YEAR, -1)
+			cal.timeInMillis to cal.timeInMillis + 6 * day
+		}
+		Period.MONTH ->
+		{
+			cal.timeInMillis = startOfDay(now)
+			cal.set(Calendar.DAY_OF_MONTH, 1)
+			val start = cal.timeInMillis
+			start to start + (cal.getActualMaximum(Calendar.DAY_OF_MONTH) - 1) * day
+		}
+	}
+	val days = TrafficHistory.range(context, from, to)
+	val dow = SimpleDateFormat("EEEEEE", Locale.getDefault())
+	val parse = SimpleDateFormat("yyyy-MM-dd", Locale.US)
+	val labels = days.mapIndexed { i, d ->
+		val date = parse.parse(d.day)!!
+		when (period)
+		{
+			Period.MONTH -> if (i % 5 == 0) (i + 1).toString() else ""
+			else -> dow.format(date).replaceFirstChar { it.uppercase() }
+		}
+	}
+	val today = TrafficHistory.dayKey(now)
+	val highlight = days.indexOfFirst { it.day == today }
+	val title = when (period)
+	{
+		Period.DAY -> context.getString(R.string.stats_today)
+		Period.WEEK ->
+		{
+			val f = SimpleDateFormat("d MMMM", Locale.getDefault())
+			val a = parse.parse(days.first().day)!!
+			val b = parse.parse(days.last().day)!!
+			SimpleDateFormat("d", Locale.getDefault()).format(a) + " – " + f.format(b)
+		}
+		Period.MONTH -> SimpleDateFormat("LLLL yyyy", Locale.getDefault()).format(parse.parse(days.first().day)!!).replaceFirstChar { it.uppercase() }
+	}
+	/* apps: system counters over the same period (needs usage access) */
+	val usage = AppTraffic.hasAccess(context)
+	val since = if (period == Period.DAY) startOfDay(now) else from
+	val direct = runCatching { RoutingManager.getInstance(context).computeExcludedPackages() }.getOrDefault(emptySet())
+	val pm = context.packageManager
+	val apps = if (!usage) emptyList() else AppTraffic.since(context, since).entries.sortedByDescending { it.value }.take(5).map { (pkg, bytes) ->
+		val info = runCatching { pm.getApplicationInfo(pkg, 0) }.getOrNull()
+		AppRow(info?.let { pm.getApplicationLabel(it).toString() } ?: pkg, info?.let { runCatching { pm.getApplicationIcon(it) }.getOrNull() }, bytes, pkg in direct)
+	}
+	return StatsData(days, title, labels, highlight, TrafficHistory.firstDay(context), apps, usage)
+}
+
+@Composable
+private fun StatsScreen(onBack: () -> Unit)
+{
+	val c = LocalShxColors.current
+	val context = LocalContext.current
+	var period by rememberSaveable { mutableIntStateOf(Period.WEEK.ordinal) }
+	val changes by TrafficHistory.changes.collectAsStateWithLifecycle()
+	val data by produceState<StatsData?>(null, period, changes) {
+		value = withContext(Dispatchers.IO) { load(context, Period.entries[period]) }
+	}
+	SecondaryScaffold(title = stringResource(R.string.stats_title), onBack = onBack) { padding ->
+		Column(
+			verticalArrangement = Arrangement.spacedBy(14.dp),
+			modifier = Modifier.fillMaxSize().padding(padding).verticalScroll(rememberScrollState()).padding(start = 16.dp, end = 16.dp, top = 4.dp, bottom = 24.dp),
+		)
+		{
+			ShxTabs(Period.entries.map { stringResource(it.label) }, period, { period = it })
+			val d = data ?: return@Column
+			val today = TrafficHistory.dayKey(System.currentTimeMillis())
+			/* F_StatsEmpty: nothing older than today yet */
+			val fresh = d.first == null || d.first >= today
+			val shown = if (Period.entries[period] == Period.DAY) d.days.filter { it.day == today } else d.days
+			val vpn = shown.sumOf { it.vpn }
+			val direct = shown.sumOf { it.direct }
+			val shape = RoundedCornerShape(24.dp)
+			Column(
+				verticalArrangement = Arrangement.spacedBy(14.dp),
+				modifier = Modifier.fillMaxWidth().clip(shape).background(c.card).border(1.dp, c.cardBorder, shape).padding(18.dp),
+			)
+			{
+				Column(verticalArrangement = Arrangement.spacedBy(2.dp))
+				{
+					Text(d.title, style = ShxType.sub.copy(fontWeight = FontWeight.SemiBold), color = c.textSub)
+					Text(formatBytes(vpn + direct), style = ShxType.number.copy(fontSize = 32.sp, lineHeight = 36.sp), color = c.text)
+				}
+				Bars(d, fresh, today)
+				if (!fresh)
+				{
+					Row(horizontalArrangement = Arrangement.spacedBy(10.dp))
+					{
+						Tile(stringResource(R.string.stats_vpn), formatBytes(vpn), c.accentContainer, c.onAccentContainer, Modifier.weight(1f))
+						Tile(stringResource(R.string.stats_direct), formatBytes(direct), c.tile, c.textSoft, Modifier.weight(1f))
+					}
+				}
+			}
+			if (fresh)
+			{
+				Row(
+					horizontalArrangement = Arrangement.spacedBy(12.dp),
+					modifier = Modifier.fillMaxWidth().clip(RoundedCornerShape(22.dp)).background(c.accentSoft).padding(16.dp),
+				)
+				{
+					Icon(ShxIcons.Stats, contentDescription = null, tint = c.onAccentContainer, modifier = Modifier.size(22.dp))
+					Column(verticalArrangement = Arrangement.spacedBy(4.dp))
+					{
+						Text(stringResource(R.string.stats_fresh_title), style = ShxType.cardTitle, color = c.text)
+						Text(stringResource(R.string.stats_fresh_text), style = ShxType.note.copy(lineHeight = 19.sp, fontWeight = FontWeight.Normal), color = c.onAccentContainer)
+					}
+				}
+			}
+			Column(verticalArrangement = Arrangement.spacedBy(8.dp))
+			{
+				Text(stringResource(R.string.stats_apps), style = ShxType.cardTitle, color = c.text, modifier = Modifier.padding(horizontal = 4.dp))
+				val panel = RoundedCornerShape(22.dp)
+				Column(Modifier.fillMaxWidth().clip(panel).background(c.card).border(1.dp, c.cardBorder, panel).padding(horizontal = 14.dp, vertical = 4.dp))
+				{
+					when
+					{
+						!d.usage -> Row(
+							verticalAlignment = Alignment.CenterVertically,
+							horizontalArrangement = Arrangement.spacedBy(10.dp),
+							modifier = Modifier.fillMaxWidth().clickable(role = Role.Button) {
+								if (runCatching { context.startActivity(Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS, Uri.fromParts("package", context.packageName, null))) }.isFailure)
+								{
+									runCatching { context.startActivity(Intent(Settings.ACTION_USAGE_ACCESS_SETTINGS)) }
+								}
+							}.padding(vertical = 14.dp),
+						)
+						{
+							Text(stringResource(R.string.stats_apps_access), style = ShxType.note.copy(fontWeight = FontWeight.Normal), color = c.textSoft, modifier = Modifier.weight(1f))
+							Text(stringResource(R.string.perm_allow), style = ShxType.chip.copy(fontWeight = FontWeight.ExtraBold), color = c.accentText)
+						}
+						d.apps.isEmpty() -> Text(stringResource(R.string.stats_apps_none), style = ShxType.note, color = c.textSub, modifier = Modifier.padding(vertical = 14.dp))
+						else ->
+						{
+							val max = d.apps.maxOf { it.bytes }.coerceAtLeast(1)
+							d.apps.forEach { AppLine(it, it.bytes.toFloat() / max) }
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+@Composable
+private fun Bars(d: StatsData, fresh: Boolean, today: String)
+{
+	val c = LocalShxColors.current
+	val max = d.days.maxOf { it.total }.coerceAtLeast(1)
+	val month = d.days.size > 7
+	val outline = c.outline
+	Row(
+		horizontalArrangement = Arrangement.spacedBy(if (month) 3.dp else 10.dp),
+		verticalAlignment = Alignment.Bottom,
+		modifier = Modifier.fillMaxWidth().height(if (fresh) 140.dp else 170.dp),
+	)
+	{
+		d.days.forEachIndexed { i, day ->
+			Column(horizontalAlignment = Alignment.CenterHorizontally, verticalArrangement = Arrangement.spacedBy(6.dp), modifier = Modifier.weight(1f))
+			{
+				Column(Modifier.weight(1f).fillMaxWidth(), verticalArrangement = Arrangement.spacedBy(2.dp, Alignment.Bottom))
+				{
+					val before = d.first == null || day.day < d.first
+					if (day.day > today)
+					{	/* days still ahead: nothing to draw */
+					}
+					else if (before)
+					{	/* no history yet: a dashed placeholder as on F_StatsEmpty */
+						Box(
+							Modifier.fillMaxWidth().height(34.dp).drawBehind {
+								drawRoundRect(
+									outline, cornerRadius = CornerRadius(6.dp.toPx()),
+									style = Stroke(1.5.dp.toPx(), pathEffect = PathEffect.dashPathEffect(floatArrayOf(6f, 6f))),
+								)
+							},
+						)
+					}
+					else
+					{
+						val full = 150f
+						val directH = (day.direct.toFloat() / max * full).coerceAtLeast(if (day.direct > 0) 3f else 0f)
+						val vpnH = (day.vpn.toFloat() / max * full).coerceAtLeast(if (day.vpn > 0 || day.direct == 0L) 4f else 0f)
+						if (directH > 0f)
+						{
+							Box(Modifier.fillMaxWidth().height(directH.dp).clip(RoundedCornerShape(topStart = 6.dp, topEnd = 6.dp, bottomStart = 2.dp, bottomEnd = 2.dp)).background(outline))
+						}
+						Box(
+							Modifier.fillMaxWidth().height(vpnH.dp)
+								.clip(if (directH > 0f) RoundedCornerShape(topStart = 2.dp, topEnd = 2.dp, bottomStart = 6.dp, bottomEnd = 6.dp) else RoundedCornerShape(6.dp))
+								.background(if (fresh && day.day == today) c.accent else if (fresh) c.tile else c.accent),
+						)
+					}
+				}
+				Text(
+					d.labels[i], style = ShxType.meta.copy(fontWeight = if (i == d.highlight) FontWeight.ExtraBold else FontWeight.SemiBold),
+					color = if (i == d.highlight) c.text else c.textSub, maxLines = 1, softWrap = false,
+					/* two-digit dates of the month view are wider than their thin bar */
+					modifier = Modifier.wrapContentWidth(unbounded = true),
+				)
+			}
+		}
+	}
+}
+
+@Composable
+private fun Tile(label: String, value: String, bg: Color, fg: Color, modifier: Modifier)
+{
+	val c = LocalShxColors.current
+	Column(verticalArrangement = Arrangement.spacedBy(2.dp), modifier = modifier.clip(RoundedCornerShape(16.dp)).background(bg).padding(12.dp))
+	{
+		Text(label, style = ShxType.meta.copy(fontWeight = FontWeight.Bold), color = fg)
+		Text(value, style = ShxType.cardHeading.copy(fontSize = 20.sp), color = c.text)
+	}
+}
+
+@Composable
+private fun AppLine(app: AppRow, share: Float)
+{
+	val c = LocalShxColors.current
+	val icon = remember(app) { app.icon?.toBitmap(96, 96)?.asImageBitmap() }
+	Row(verticalAlignment = Alignment.CenterVertically, horizontalArrangement = Arrangement.spacedBy(12.dp), modifier = Modifier.fillMaxWidth().padding(vertical = 10.dp))
+	{
+		Box(contentAlignment = Alignment.Center, modifier = Modifier.size(36.dp).clip(RoundedCornerShape(10.dp)).background(c.tile))
+		{
+			if (icon != null)
+			{
+				Image(icon, contentDescription = null, modifier = Modifier.size(36.dp))
+			}
+			else
+			{
+				Text(app.label.take(1).uppercase(), style = ShxType.chip.copy(fontWeight = FontWeight.ExtraBold), color = c.textSoft)
+			}
+		}
+		Column(Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(6.dp))
+		{
+			Row()
+			{
+				Text(app.label, style = ShxType.body.copy(fontWeight = FontWeight.Bold), color = c.text, maxLines = 1, overflow = TextOverflow.Ellipsis, modifier = Modifier.weight(1f))
+				Spacer(Modifier.size(8.dp))
+				Text(formatBytes(app.bytes), style = ShxType.body.copy(fontWeight = FontWeight.Bold), color = c.text)
+			}
+			Box(Modifier.fillMaxWidth().height(6.dp).clip(RoundedCornerShape(3.dp)).background(c.tile))
+			{
+				/* purple: through the VPN, grey: goes direct */
+				Box(Modifier.fillMaxWidth(share.coerceIn(0.02f, 1f)).height(6.dp).clip(RoundedCornerShape(3.dp)).background(if (app.direct) c.textSub else c.accent))
+			}
+		}
+	}
+}

src/frontends/android/app/src/main/java/org/strongswan/android/ui/compose/Format.kt

@@ -12,13 +12,16 @@ package org.strongswan.android.ui.compose
 import java.util.Locale
 import kotlin.math.abs
 
+/* «1,2 ГБ» in Russian, «1.2 GB» otherwise */
+private fun russian() = Locale.getDefault().language == "ru"
+
 fun formatBytes(bytes: Long): String
 {
+	val units = if (russian()) arrayOf("Б", "КБ", "МБ", "ГБ", "ТБ") else arrayOf("B", "KB", "MB", "GB", "TB")
 	if (bytes <= 0L)
 	{
-		return "0 B"
+		return "0 " + units[0]
 	}
-	val units = arrayOf("B", "KB", "MB", "GB", "TB")
 	var value = bytes.toDouble()
 	var unit = 0
 	while (value >= 1024 && unit < units.lastIndex)
@@ -26,17 +29,18 @@ fun formatBytes(bytes: Long): String
 		value /= 1024
 		unit++
 	}
-	return if (unit == 0) String.format(Locale.US, "%d %s", bytes, units[unit])
-	else String.format(Locale.US, "%.1f %s", value, units[unit])
+	return if (unit == 0) String.format(Locale.getDefault(), "%d %s", bytes, units[unit])
+	else String.format(Locale.getDefault(), "%.1f %s", value, units[unit])
 }
 
 fun formatRate(bytesPerSecond: Long): String
 {
+	val perSecond = if (russian()) "/с" else "/s"
 	if (abs(bytesPerSecond) < 32)
 	{
-		return "0 B/s"
+		return formatBytes(0) + perSecond
 	}
-	return formatBytes(bytesPerSecond) + "/s"
+	return formatBytes(bytesPerSecond) + perSecond
 }
 
 fun formatDuration(seconds: Long): String

src/frontends/android/app/src/main/java/org/strongswan/android/ui/compose/HomeScreen.kt

@@ -259,6 +259,10 @@ fun HomeScreen(
 			kotlinx.coroutines.delay(600)
 		}
 	}
+	val historyChanges by org.strongswan.android.logic.stats.TrafficHistory.changes.collectAsStateWithLifecycle()
+	val today by produceState<org.strongswan.android.logic.stats.DayTraffic?>(null, historyChanges) {
+		value = withContext(Dispatchers.IO) { org.strongswan.android.logic.stats.TrafficHistory.today(context) }
+	}
 	val model = HomeModel(
 		state = state,
 		traffic = traffic,
@@ -275,6 +279,7 @@ fun HomeScreen(
 		findingFastest = findingFastest,
 		certExpiry = certExpiry,
 		connectStep = connectStep,
+		today = today,
 	)
 	val actions = HomeActions(
 		connect = { selected?.let { viewModel.connect(context, it) } },
@@ -316,6 +321,7 @@ fun HomeScreen(
 		},
 		details = { viewModel.openDetails(true) },
 		certUpdate = { ShxNavigation.requestAddServer() },
+		stats = { context.startActivity(Intent(context, org.strongswan.android.ui.StatsActivity::class.java)) },
 		certLater = {
 			certAlias?.let { snoozeCertExpiry(context, it) }
 			certSnoozes++

src/frontends/android/app/src/main/java/org/strongswan/android/ui/compose/home/HomeContent.kt

@@ -64,6 +64,8 @@ internal data class HomeModel(
 	val certExpiry: CertExpiry? = null,
 	/* finished steps of the running connection (F_HomeConnecting) */
 	val connectStep: Int = 1,
+	/* today's traffic from the history */
+	val today: org.strongswan.android.logic.stats.DayTraffic? = null,
 )
 
 /** What Home can do. */
@@ -87,6 +89,7 @@ internal class HomeActions(
 	val details: () -> Unit,
 	val certUpdate: () -> Unit = {},
 	val certLater: () -> Unit = {},
+	val stats: () -> Unit = {},
 )
 
 /** Two-letter badge of a server: the exit country when known, else the profile initials. */
@@ -310,16 +313,18 @@ internal fun HomeContent(m: HomeModel, a: HomeActions)
 						QuickTile(ShxIcons.Bolt, stringResource(if (m.findingFastest) R.string.home_fastest_searching else R.string.home_action_fastest), a.fastest, Modifier.weight(1f))
 						QuickTile(ShxIcons.Help, stringResource(R.string.home_action_not_loading), a.routeCheck, Modifier.weight(1f))
 					}
-					val t = m.traffic
-					val split = t.split
-					val vpnShare = split?.let { 100 - it.directShare }
+					/* today from the history (F_Home «1,24 ГБ сегодня»), the session before the first sample */
+					val today = m.today
+					val todayTotal = today?.total ?: 0L
+					val vpnShare = if (today != null && today.direct > 0 && todayTotal > 0) (today.vpn * 100 / todayTotal).toInt()
+						else m.traffic.split?.let { 100 - it.directShare }
 					TrafficCard(
-						amount = formatBytes(t.bytesIn + t.bytesOut),
-						period = stringResource(R.string.home_traffic_session),
+						amount = formatBytes(if (todayTotal > 0) todayTotal else m.traffic.bytesIn + m.traffic.bytesOut),
+						period = stringResource(if (todayTotal > 0) R.string.home_traffic_today else R.string.home_traffic_session),
 						vpnShare = vpnShare,
 						caption = if (vpnShare != null) stringResource(R.string.home_traffic_split, vpnShare, 100 - vpnShare)
 							else stringResource(R.string.home_traffic_all_vpn),
-						onClick = a.details,
+						onClick = a.stats,
 					)
 				}
 				connecting || s.vpnState == State.DISCONNECTING ->
@@ -352,6 +357,18 @@ internal fun HomeContent(m: HomeModel, a: HomeActions)
 							QuickTile(ShxIcons.Globe, stringResource(R.string.home_action_switch), a.pickServer, Modifier.weight(1f))
 						}
 					}
+					/* F_HomeScenario: today's traffic stays visible while off */
+					m.today?.takeIf { it.total > 0 }?.let { today ->
+						val share = if (today.direct > 0) (today.vpn * 100 / today.total).toInt() else null
+						TrafficCard(
+							amount = formatBytes(today.total),
+							period = stringResource(R.string.home_traffic_today),
+							vpnShare = share,
+							caption = if (share != null) stringResource(R.string.home_traffic_split, share, 100 - share)
+								else stringResource(R.string.home_traffic_all_vpn),
+							onClick = a.stats,
+						)
+					}
 				}
 			}
 			m.certExpiry?.let { expiry ->

src/frontends/android/app/src/main/java/org/strongswan/android/ui/widget/ShxWidget.kt

@@ -80,6 +80,8 @@ internal data class WidgetSnapshot(
 	val profileUuid: String?,
 	/* wall-clock start of the running connection, 0 if none */
 	val connectedSince: Long,
+	/* today's traffic from the history */
+	val today: org.strongswan.android.logic.stats.DayTraffic? = null,
 )
 
 /**
@@ -132,6 +134,33 @@ object ShxWidgetState
 		}
 	}
 
+	/** Redraws the widgets (new traffic numbers); at most once a minute. */
+	@JvmStatic
+	fun refresh(context: Context)
+	{
+		val now = System.currentTimeMillis()
+		if (now - lastRefresh < 60_000L)
+		{
+			return
+		}
+		lastRefresh = now
+		val app = context.applicationContext
+		scope.launch {
+			try
+			{
+				if (GlanceAppWidgetManager(app).getGlanceIds(ShxWidget::class.java).isNotEmpty())
+				{
+					ShxWidget().updateAll(app)
+				}
+			}
+			catch (_: Exception)
+			{
+			}
+		}
+	}
+
+	@Volatile private var lastRefresh = 0L
+
 	internal suspend fun snapshot(context: Context): WidgetSnapshot = withContext(Dispatchers.IO)
 	{
 		val prefs = PreferenceManager.getDefaultSharedPreferences(context)
@@ -154,7 +183,8 @@ object ShxWidgetState
 			}
 		}
 		val state = prefs.getString(KEY_STATE, null) ?: VpnStateService.State.DISABLED.name
-		WidgetSnapshot(state, prefs.getString(KEY_ERROR, null), name, uuid, prefs.getLong(KEY_SINCE, 0L))
+		val today = runCatching { org.strongswan.android.logic.stats.TrafficHistory.today(context) }.getOrNull()?.takeIf { it.total > 0 }
+		WidgetSnapshot(state, prefs.getString(KEY_ERROR, null), name, uuid, prefs.getLong(KEY_SINCE, 0L), today)
 	}
 }
 
@@ -371,12 +401,28 @@ private fun LargeWidget(context: Context, s: WidgetSnapshot, look: Look, toggle:
 						Title(t, problem)
 					}
 					Spacer(GlanceModifier.height(2.dp))
-					Sub(s.profileName ?: context.getString(R.string.status_choose_profile), problem)
+					val server = s.profileName ?: context.getString(R.string.status_choose_profile)
+					Sub(
+						s.today?.let { context.getString(R.string.widget_server_today, server, org.strongswan.android.ui.compose.formatBytes(it.total)) } ?: server,
+						problem,
+					)
 				}
 				Spacer(GlanceModifier.width(8.dp))
 				ToggleButton(look, toggle)
 			}
 			Spacer(GlanceModifier.defaultWeight())
+			/* today's split: purple through the VPN, green direct */
+			s.today?.takeIf { it.direct > 0 }?.let { t ->
+				val width = LocalSize.current.width - 28.dp
+				val vpnWidth = (width - 2.dp) * (t.vpn.toFloat() / t.total)
+				Row(GlanceModifier.fillMaxWidth().height(6.dp))
+				{
+					Box(GlanceModifier.width(vpnWidth).height(6.dp).cornerRadius(3.dp).background(ACCENT)) {}
+					Spacer(GlanceModifier.width(2.dp))
+					Box(GlanceModifier.defaultWeight().height(6.dp).cornerRadius(3.dp).background(cp(0xFF3FBF7F, 0xFF3FBF7F))) {}
+				}
+				Spacer(GlanceModifier.defaultWeight())
+			}
 			Row(GlanceModifier.fillMaxWidth())
 			{
 				val pause = Intent(context, PauseReceiver::class.java).setAction(PauseManager.ACTION_PAUSE)

src/frontends/android/app/src/main/res/values-ru/strings.xml

@@ -1137,4 +1137,18 @@
     <string name="install_perm_safe">Безопасно: приложение ставит только файлы с подписью SHX и проверенной контрольной суммой.</string>
     <string name="install_perm_later">Не сейчас</string>
     <string name="install_perm_open">Открыть разрешение</string>
+    <string name="stats_title">Статистика</string>
+    <string name="stats_day">День</string>
+    <string name="stats_week">Неделя</string>
+    <string name="stats_month">Месяц</string>
+    <string name="stats_today">Сегодня</string>
+    <string name="stats_vpn">Через VPN</string>
+    <string name="stats_direct">Напрямую (РФ)</string>
+    <string name="stats_apps">Приложения</string>
+    <string name="stats_apps_access">Разрешите доступ к статистике, чтобы видеть, какие приложения тратят больше всего.</string>
+    <string name="stats_apps_none">За этот период трафика приложений пока нет.</string>
+    <string name="stats_fresh_title">История копится с сегодняшнего дня</string>
+    <string name="stats_fresh_text">Через неделю здесь будет видно, сколько трафика идёт через VPN и сколько напрямую, и какие приложения тратят больше всего.</string>
+    <string name="home_traffic_today">сегодня</string>
+    <string name="widget_server_today">%1$s · %2$s сегодня</string>
 </resources>

src/frontends/android/app/src/main/res/values/strings.xml

@@ -1123,4 +1123,18 @@
     <string name="install_perm_safe">Safe: the app only installs files signed by SHX with a verified checksum.</string>
     <string name="install_perm_later">Not now</string>
     <string name="install_perm_open">Open permission</string>
+    <string name="stats_title">Statistics</string>
+    <string name="stats_day">Day</string>
+    <string name="stats_week">Week</string>
+    <string name="stats_month">Month</string>
+    <string name="stats_today">Today</string>
+    <string name="stats_vpn">Through VPN</string>
+    <string name="stats_direct">Direct (RU)</string>
+    <string name="stats_apps">Apps</string>
+    <string name="stats_apps_access">Allow usage access to see which apps use the most traffic.</string>
+    <string name="stats_apps_none">No app traffic in this period yet.</string>
+    <string name="stats_fresh_title">The history starts today</string>
+    <string name="stats_fresh_text">In a week you will see how much traffic goes through the VPN and how much direct, and which apps use the most.</string>
+    <string name="home_traffic_today">today</string>
+    <string name="widget_server_today">%1$s · %2$s today</string>
 </resources>