chore: bump to 1.20 (rings release)

Rings were capped at a fixed 86dp; now each gauge fills its half of the widget
(weighted ImageView) so they grow with the placed widget size. Bumped RingRenderer
default bitmap to 360px/36 stroke to stay crisp at the larger display size.

app/build.gradle.kts

@@ -24,8 +24,8 @@ android {
         applicationId = "me.khodak.claudeusage"
         minSdk = 26
         targetSdk = 34
-        versionCode = 20
-        versionName = "1.19"
+        versionCode = 21
+        versionName = "1.20"
     }
 
     val releaseStorePassword = signingCred("KEYSTORE_PASSWORD", "storePassword")

app/src/main/java/me/khodak/claudeusage/ClaudeUsageWidget.kt

@@ -84,13 +84,20 @@ class ClaudeUsageWidget : AppWidgetProvider() {
                 return v
             }
 
+            // Full-size builder follows the user's chosen style; the compact (1-cell-tall) size
+            // always uses bars, since two rings don't fit that height.
+            val rings = prefs.getWidgetStyle() == PreferencesManager.STYLE_RINGS
+            fun buildFull() =
+                if (rings) buildRingViews(context, prefs, apiData)
+                else buildViews(context, prefs, apiData)
+
             return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
                 RemoteViews(mapOf(
                     SizeF(50f, 50f)  to attach(buildSmallViews(context, prefs, apiData)),
-                    SizeF(50f, 120f) to attach(buildViews(context, prefs, apiData))
+                    SizeF(50f, 120f) to attach(buildFull())
                 ))
             } else {
-                attach(buildViews(context, prefs, apiData))
+                attach(buildFull())
             }
         }
 
@@ -252,6 +259,80 @@ class ClaudeUsageWidget : AppWidgetProvider() {
             return v
         }
 
+        /**
+         * Ring style of the full widget — same data/branching as [buildViews] but each metric is a
+         * circular [RingRenderer] gauge (percentage drawn in the center) instead of a bar.
+         */
+        private fun buildRingViews(context: Context, prefs: PreferencesManager, apiData: UsageData?): RemoteViews {
+            val v = RemoteViews(context.packageName, R.layout.widget_layout_rings)
+            applyPeak(v, showText = true)
+
+            if (!prefs.isLoggedIn()) {
+                v.setImageViewBitmap(R.id.ring_session, RingRenderer.render(0, null, SESSION_FILL, null, "—", "SESSION"))
+                v.setImageViewBitmap(R.id.ring_weekly, RingRenderer.render(0, null, WEEKLY_FILL, null, "—", "WEEKLY"))
+                v.setTextViewText(R.id.tv_session_label, "Not signed in")
+                v.setTextViewText(R.id.tv_weekly_label, "Open app to sign in")
+                v.setTextViewText(R.id.tv_status, "")
+                return v
+            }
+
+            // ── 5-hour session ring ──────────────────────────────────────────
+            val hasUtilization = apiData != null && apiData.fiveHourUtilization >= 0f
+            val hasApiMessages = apiData != null && apiData.effectiveRemaining >= 0 && apiData.messagesLimit > 0
+            val sessionStart = prefs.getSessionStart()
+            when {
+                hasUtilization -> {
+                    val pct = apiData!!.fiveHourUtilization.toInt()
+                    v.setImageViewBitmap(R.id.ring_session, RingRenderer.render(pct, null, SESSION_FILL, null, "$pct%", "SESSION"))
+                    v.setTextViewText(R.id.tv_session_label, formatReset(apiData.utilizationResetAtEpoch))
+                }
+                hasApiMessages -> {
+                    val pct = apiData!!.progressPercent
+                    v.setImageViewBitmap(R.id.ring_session, RingRenderer.render(pct, null, SESSION_FILL, null, "$pct%", "SESSION"))
+                    v.setTextViewText(R.id.tv_session_label, formatReset(apiData.resetAtEpoch))
+                }
+                sessionStart > 0 -> {
+                    v.setImageViewBitmap(R.id.ring_session, RingRenderer.render(0, null, SESSION_FILL, null, "·", "SESSION"))
+                    v.setTextViewText(R.id.tv_session_label, "session active")
+                }
+                else -> {
+                    v.setImageViewBitmap(R.id.ring_session, RingRenderer.render(0, null, SESSION_FILL, null, "—", "SESSION"))
+                    v.setTextViewText(R.id.tv_session_label, "")
+                }
+            }
+
+            // ── 7-day weekly ring (with pace tick) ───────────────────────────
+            val hasWeekly = apiData != null && apiData.weeklyUtilization >= 0f
+            if (hasWeekly) {
+                val wPct = apiData!!.weeklyUtilization.toInt()
+                val pace = PaceCalc.compute(apiData.weeklyUtilization, apiData.weeklyResetAtEpoch, PaceCalc.WEEKLY_WINDOW_MS)
+                v.setImageViewBitmap(
+                    R.id.ring_weekly,
+                    RingRenderer.render(wPct, pace?.markerPct, WEEKLY_FILL, if (pace != null) MARKER_COLOR else null, "$wPct%", "WEEKLY")
+                )
+                v.setTextViewText(R.id.tv_weekly_label, formatResetDay(apiData.weeklyResetAtEpoch))
+            } else {
+                val weeklyDays = Integer.bitCount(prefs.getWeeklyMask())
+                v.setImageViewBitmap(R.id.ring_weekly, RingRenderer.render(0, null, WEEKLY_FILL, null, "${weeklyDays}d", "WEEKLY"))
+                v.setTextViewText(R.id.tv_weekly_label, "active this week")
+            }
+
+            // ── Footer ───────────────────────────────────────────────────────
+            val resetEpoch = apiData?.effectiveResetEpoch ?: -1L
+            val status = when {
+                isRefreshing -> "Refreshing…"
+                apiData?.isRateLimited == true -> "Rate limited · ${formatReset(resetEpoch)}"
+                else -> ""
+            }
+            val updatedMs = apiData?.lastUpdated ?: 0L
+            v.setTextViewText(R.id.tv_status,
+                if (status.isNotBlank()) status else if (updatedMs > 0) formatTime(updatedMs) else "")
+            v.setInt(R.id.btn_refresh, "setColorFilter",
+                if (isRefreshing) 0xFFCC785C.toInt() else 0xFF999999.toInt())
+            v.setFloat(R.id.btn_refresh, "setRotation", currentRotation)
+            return v
+        }
+
         private const val SESSION_FILL = 0xFFCC785C.toInt()
         private const val WEEKLY_FILL = 0xFF7B8FCC.toInt()
         private const val MARKER_COLOR = 0xFFFFFFFF.toInt()   // single-color pace marker (weekly only)

app/src/main/java/me/khodak/claudeusage/MainActivity.kt

@@ -66,6 +66,7 @@ class MainActivity : AppCompatActivity() {
         }
 
         setupNotificationSettings()
+        setupWidgetStyleSetting()
 
         binding.btnDebug.setOnClickListener {
             if (binding.tvDebugInfo.visibility == android.view.View.GONE) {
@@ -112,6 +113,15 @@ class MainActivity : AppCompatActivity() {
         if (prefs.isNotifyEnabled()) requestNotificationPermission()
     }
 
+    /** Bars ⇄ Rings switch for the home-screen widget; redraws any placed widgets immediately. */
+    private fun setupWidgetStyleSetting() {
+        binding.switchRingStyle.isChecked = prefs.getWidgetStyle() == PreferencesManager.STYLE_RINGS
+        binding.switchRingStyle.setOnCheckedChangeListener { _, checked ->
+            prefs.setWidgetStyle(if (checked) PreferencesManager.STYLE_RINGS else PreferencesManager.STYLE_BARS)
+            ClaudeUsageWidget.notifyDataChanged(this)
+        }
+    }
+
     private fun requestNotificationPermission() {
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) return
         if (ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS)

app/src/main/java/me/khodak/claudeusage/RingRenderer.kt

@@ -0,0 +1,120 @@
+package me.khodak.claudeusage
+
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.RectF
+import android.graphics.Typeface
+import kotlin.math.cos
+import kotlin.math.sin
+
+/**
+ * Draws a usage gauge as a circular ring Bitmap: rounded track ring + colored progress arc
+ * (sweeping clockwise from 12 o'clock) + an optional radial pace tick + center percentage and
+ * label. The ring counterpart to [BarRenderer] — same Bitmap contract, so it drops into both the
+ * home-screen widget (setImageViewBitmap) and the in-app card and renders identically.
+ *
+ * Design mirrors hamed-elfayome/Claude-Usage-Tracker's ring gauges, using this app's existing
+ * palette (SESSION_FILL clay / WEEKLY_FILL periwinkle, #252525 track, white pace marker).
+ */
+object RingRenderer {
+
+    private const val TRACK_COLOR = 0xFF252525.toInt()
+    private const val CENTER_TEXT_COLOR = 0xFFFFFFFF.toInt()
+    private const val LABEL_TEXT_COLOR = 0xFF999999.toInt()
+
+    /**
+     * @param usedPct      0..100 fill of the ring
+     * @param markerPct    where you "should be" right now (pace), or null for no tick
+     * @param fillColor    ARGB progress-arc color (e.g. SESSION_FILL / WEEKLY_FILL)
+     * @param markerColor  ARGB pace-tick color, or null
+     * @param centerText   big text in the middle, e.g. "47%" (caller formats it)
+     * @param labelText    small caption under the number, e.g. "SESSION" (null hides it)
+     * @param sizePx       square bitmap edge; ring scales to fit
+     * @param strokePx     ring thickness
+     */
+    fun render(
+        usedPct: Int,
+        markerPct: Int?,
+        fillColor: Int,
+        markerColor: Int?,
+        centerText: String,
+        labelText: String? = null,
+        sizePx: Int = 360,
+        strokePx: Float = 36f
+    ): Bitmap {
+        val bmp = Bitmap.createBitmap(sizePx, sizePx, Bitmap.Config.ARGB_8888)
+        val canvas = Canvas(bmp)
+        val cx = sizePx / 2f
+        val cy = sizePx / 2f
+        val pad = strokePx / 2f + 2f
+        val arcRect = RectF(pad, pad, sizePx - pad, sizePx - pad)
+        val radius = (sizePx - strokePx) / 2f - 2f
+
+        // Track ring (full circle).
+        val track = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+            style = Paint.Style.STROKE
+            strokeWidth = strokePx
+            strokeCap = Paint.Cap.ROUND
+            color = TRACK_COLOR
+        }
+        canvas.drawArc(arcRect, 0f, 360f, false, track)
+
+        // Progress arc — clockwise from 12 o'clock (-90°).
+        val pct = usedPct.coerceIn(0, 100)
+        if (pct > 0) {
+            val fill = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+                style = Paint.Style.STROKE
+                strokeWidth = strokePx
+                strokeCap = Paint.Cap.ROUND
+                color = fillColor
+            }
+            canvas.drawArc(arcRect, -90f, pct / 100f * 360f, false, fill)
+        }
+
+        // Pace tick — a short radial mark across the ring at the "should be here" angle.
+        if (markerPct != null && markerColor != null) {
+            val m = markerPct.coerceIn(0, 100)
+            val ang = Math.toRadians((-90f + m / 100f * 360f).toDouble())
+            val rInner = radius - strokePx / 2f - 1f
+            val rOuter = radius + strokePx / 2f + 1f
+            val tick = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+                style = Paint.Style.STROKE
+                strokeWidth = strokePx * 0.18f
+                strokeCap = Paint.Cap.ROUND
+                color = markerColor
+            }
+            canvas.drawLine(
+                cx + (rInner * cos(ang)).toFloat(), cy + (rInner * sin(ang)).toFloat(),
+                cx + (rOuter * cos(ang)).toFloat(), cy + (rOuter * sin(ang)).toFloat(),
+                tick
+            )
+        }
+
+        // Center percentage.
+        val hasLabel = !labelText.isNullOrEmpty()
+        val valuePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+            color = CENTER_TEXT_COLOR
+            textAlign = Paint.Align.CENTER
+            textSize = sizePx * 0.27f
+            typeface = Typeface.create(Typeface.DEFAULT, Typeface.BOLD)
+        }
+        val vfm = valuePaint.fontMetrics
+        val valueBaselineShift = -(vfm.ascent + vfm.descent) / 2f
+        val valueY = cy + valueBaselineShift - (if (hasLabel) sizePx * 0.07f else 0f)
+        canvas.drawText(centerText, cx, valueY, valuePaint)
+
+        if (hasLabel) {
+            val labelPaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+                color = LABEL_TEXT_COLOR
+                textAlign = Paint.Align.CENTER
+                textSize = sizePx * 0.105f
+                letterSpacing = 0.12f
+                typeface = Typeface.create(Typeface.DEFAULT, Typeface.BOLD)
+            }
+            canvas.drawText(labelText!!.uppercase(), cx, cy + sizePx * 0.17f, labelPaint)
+        }
+
+        return bmp
+    }
+}

app/src/main/java/me/khodak/claudeusage/data/PreferencesManager.kt

@@ -132,6 +132,12 @@ class PreferencesManager(context: Context) {
         } catch (e: Exception) { emptyList() }
     }
 
+    // ── Widget style ─────────────────────────────────────────────────────────
+
+    /** Home-screen widget visual style: [STYLE_BARS] (default) or [STYLE_RINGS]. */
+    fun getWidgetStyle(): String = prefs.getString(KEY_WIDGET_STYLE, STYLE_BARS) ?: STYLE_BARS
+    fun setWidgetStyle(style: String) = prefs.edit().putString(KEY_WIDGET_STYLE, style).apply()
+
     // ── Notification settings ────────────────────────────────────────────────
 
     fun isNotifyEnabled(): Boolean = prefs.getBoolean(KEY_NOTIFY_ENABLED, true)
@@ -155,6 +161,10 @@ class PreferencesManager(context: Context) {
         private const val KEY_HISTORY = "usage_history"
         private const val KEY_NOTIFY_ENABLED = "notify_enabled"
         private const val KEY_AUTH_FAILS = "auth_fail_count"
+        private const val KEY_WIDGET_STYLE = "widget_style"
+
+        const val STYLE_BARS = "bars"
+        const val STYLE_RINGS = "rings"
 
         internal const val MIN_HISTORY_GAP_MS = 2 * 60 * 1000L      // collapse readings <2 min apart
         private const val HISTORY_RETENTION_MS = 7 * 24 * 60 * 60 * 1000L  // keep 7 days

app/src/main/res/layout/activity_main.xml

@@ -291,6 +291,48 @@
 
             </LinearLayout>
 
+            <!-- Widget style card -->
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:background="@drawable/widget_background"
+                android:padding="20dp"
+                android:layout_marginTop="16dp">
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal"
+                    android:gravity="center_vertical">
+
+                    <TextView
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:text="RING WIDGET STYLE"
+                        android:textColor="#888888"
+                        android:textSize="11sp"
+                        android:letterSpacing="0.1" />
+
+                    <com.google.android.material.switchmaterial.SwitchMaterial
+                        android:id="@+id/switchRingStyle"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content" />
+
+                </LinearLayout>
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:text="Show usage as circular rings instead of bars on the full-size home-screen widget."
+                    android:textColor="#AAAAAA"
+                    android:textSize="13sp"
+                    android:lineSpacingExtra="3dp" />
+
+            </LinearLayout>
+
             <!-- Notifications card -->
             <LinearLayout
                 android:layout_width="match_parent"

app/src/main/res/layout/widget_layout_rings.xml

@@ -0,0 +1,169 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Ring style of the full (4x2) widget. Header + footer mirror widget_layout.xml (same view
+     IDs) so ClaudeUsageWidget can attach the same click intents and peak/refresh state; the middle
+     swaps the two horizontal bars for two circular RingRenderer gauges side by side. -->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/widget_root"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:background="@drawable/widget_background"
+    android:padding="14dp">
+
+    <!-- Header -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:gravity="center_vertical">
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="Claude Pro"
+            android:textColor="#FFFFFF"
+            android:textSize="13sp"
+            android:textStyle="bold" />
+
+        <ImageView
+            android:id="@+id/img_peak"
+            android:layout_width="16dp"
+            android:layout_height="16dp"
+            android:layout_marginEnd="4dp"
+            android:src="@drawable/ic_claude_burst"
+            android:contentDescription="Peak hours" />
+
+        <TextView
+            android:id="@+id/tv_peak"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="6dp"
+            android:text=""
+            android:textColor="#CC785C"
+            android:textSize="9sp"
+            android:textStyle="bold" />
+
+        <ImageButton
+            android:id="@+id/btn_refresh"
+            android:layout_width="32dp"
+            android:layout_height="32dp"
+            android:src="@android:drawable/ic_menu_rotate"
+            android:background="@android:color/transparent"
+            android:tint="#999999"
+            tools:ignore="UseAppTint"
+            android:contentDescription="Refresh" />
+
+    </LinearLayout>
+
+    <!-- Divider -->
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="1dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="6dp"
+        android:background="#2A2A2A" />
+
+    <!-- Two ring gauges side by side — each fills its half so the ring grows as large as the
+         placed widget allows (limited by the available height), instead of a fixed 86dp. -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:orientation="horizontal"
+        android:gravity="center"
+        android:weightSum="2">
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:orientation="vertical"
+            android:gravity="center_horizontal">
+
+            <ImageView
+                android:id="@+id/ring_session"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:scaleType="fitCenter"
+                android:adjustViewBounds="false"
+                android:contentDescription="Session usage ring" />
+
+            <TextView
+                android:id="@+id/tv_session_label"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="2dp"
+                android:gravity="center"
+                android:text=""
+                android:textColor="#999999"
+                android:textSize="10sp"
+                android:textStyle="bold" />
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:orientation="vertical"
+            android:gravity="center_horizontal">
+
+            <ImageView
+                android:id="@+id/ring_weekly"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:scaleType="fitCenter"
+                android:adjustViewBounds="false"
+                android:contentDescription="Weekly usage ring" />
+
+            <TextView
+                android:id="@+id/tv_weekly_label"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="2dp"
+                android:gravity="center"
+                android:text=""
+                android:textColor="#999999"
+                android:textSize="10sp"
+                android:textStyle="bold" />
+
+        </LinearLayout>
+
+    </LinearLayout>
+
+    <!-- Footer -->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:layout_marginTop="6dp"
+        android:gravity="center_vertical">
+
+        <TextView
+            android:id="@+id/tv_status"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text=""
+            android:textColor="#FFFFFF"
+            android:textSize="9sp"
+            android:textStyle="bold"
+            android:singleLine="true"
+            android:ellipsize="end" />
+
+        <TextView
+            android:id="@+id/tv_updated"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text=""
+            android:textColor="#FFFFFF"
+            android:textSize="9sp"
+            android:textStyle="bold" />
+
+    </LinearLayout>
+
+</LinearLayout>