almothafar · almothafar · Jul 13, 2026 · Jul 12, 2026 · Jul 13, 2026 · Jul 13, 2026
diff --git a/LICENSE.md b/LICENSE.md
diff --git a/README.md b/README.md
@@ -3,7 +3,7 @@
 [![Android CI](https://github.com/almothafar/SimpleBatteryNotifier/workflows/Android%20CI/badge.svg)](https://github.com/almothafar/SimpleBatteryNotifier/actions)
 [![Android](https://img.shields.io/badge/Android-8.0%2B%20(API%2026%2B)-green?logo=android)](https://developer.android.com/about/versions/oreo)
 [![Java](https://img.shields.io/badge/Java-25-orange?logo=openjdk)](https://openjdk.org/)
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](LICENSE)
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](LICENSE.md)
 
 A lightweight Android app to keep you informed about your battery status — without heavy resource usage or unnecessary "power saver" bloat.
 
@@ -126,7 +126,13 @@ Before submitting:
 ---
 
 ## 📄 License
-Licensed under the Apache License, Version 2.0 - see the [LICENSE](LICENSE) file for details.
+Licensed under the **GNU General Public License v3.0** — see the [LICENSE.md](LICENSE.md) file.
+
+This is free, open-source software: you may use, study, modify, and share it, **including commercially**. The one condition is copyleft — if you distribute this app or a derivative of it, you must keep it open source under GPLv3 and make your source code available. Closed-source / proprietary forks are not permitted.
+
+Copyright © 2024–2026 Al-Mothafar Al-Hasan
+
+**Acknowledgements:** the battery gauge (`CircularProgressBar`) is derived from [circular_progress_bar](https://github.com/ylyc/circular_progress_bar) by Leon Cheng, used under the Apache License 2.0 — see [THIRD-PARTY-NOTICES.md](THIRD-PARTY-NOTICES.md).
 
 ---
 

diff --git a/THIRD-PARTY-NOTICES.md b/THIRD-PARTY-NOTICES.md
@@ -0,0 +1,23 @@
+# Third-Party Notices
+
+Simple Battery Notifier is licensed under the GNU GPL v3 (see [LICENSE.md](LICENSE.md)).
+It includes third-party code that is provided under its own license, listed below.
+
+## circular_progress_bar
+
+- **Source:** https://github.com/ylyc/circular_progress_bar
+- **Copyright:** Copyright (C) 2013 Leon Cheng
+- **License:** Apache License, Version 2.0 — a full copy is provided in
+  [`licenses/Apache-2.0.txt`](licenses/Apache-2.0.txt), and is also available at
+  http://www.apache.org/licenses/LICENSE-2.0
+
+The file
+`app/src/main/java/com/almothafar/simplebatterynotifier/ui/widget/CircularProgressBar.java`
+is **derived from** this project and has been **modified** (it extends `ProgressBar`
+with a 270° gauge, adds the `cpb_*` styleable, auto-fitting title/subtitle, and a
+pulse/glow animation, among other changes).
+
+The Apache License 2.0 is compatible with the GNU GPL v3. As permitted by that
+license, the derived file and the combined work are distributed under the GNU GPL v3,
+while the original portions remain subject to the Apache 2.0 copyright and notice
+above.
diff --git a/app/src/main/java/com/almothafar/simplebatterynotifier/ui/widget/CircularProgressBar.java b/app/src/main/java/com/almothafar/simplebatterynotifier/ui/widget/CircularProgressBar.java
@@ -1,18 +1,31 @@
 /*
- * Copyright 2015 Al-Mothafar Al-Hasan
+ * Simple Battery Notifier
+ * Copyright (C) 2015-2026 Al-Mothafar Al-Hasan
  *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
+ * This file is derived from "circular_progress_bar" by Leon Cheng
+ * (https://github.com/ylyc/circular_progress_bar), Copyright (C) 2013 Leon Cheng,
+ * originally licensed under the Apache License, Version 2.0. This file has been
+ * modified from the original (extends ProgressBar with a 270-degree gauge, the
+ * cpb_* styleable, auto-fitting title/subtitle, pulse/glow animation, and more).
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ * The Apache-2.0-licensed original is used in compliance with that license; a
+ * copy of the Apache License 2.0 is provided in licenses/Apache-2.0.txt and the
+ * attribution is recorded in THIRD-PARTY-NOTICES.md. Apache 2.0 is compatible
+ * with the GNU GPL v3, so the modifications and the combined work are licensed
+ * under the GNU GPL v3 (see the project LICENSE.md).
  *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * 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 3 of the License, or
+ * (at your option) any later version.
  *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 package com.almothafar.simplebatterynotifier.ui.widget;

diff --git a/app/src/main/res/values-ar/strings.xml b/app/src/main/res/values-ar/strings.xml
@@ -244,7 +244,7 @@
     <string name="about_description">تطبيق خفيف يُبقيك على اطّلاع على حالة بطاريتك — تنبيهات عند المستويين التحذيري والحرج، وإشعارات اكتمال الشحن وارتفاع الحرارة، وسرعة الشحن، ومعلومات عن صحة البطارية. بلا حشو ولا حيل «توفير طاقة» — مجرّد تنبيهات بطارية بسيطة.</string>
     <!-- %1$s is the developer name -->
     <string name="about_developer">طوّره %1$s</string>
-    <string name="about_open_source">برنامج حر ومفتوح المصدر، مرخَّص بموجب رخصة Apache 2.0.</string>
+    <string name="about_open_source">برنامج حر ومفتوح المصدر، مرخَّص بموجب رخصة جنو العمومية العامة الإصدار 3.</string>
     <string name="about_disclaimer">قراءات البطارية وأرقام الصحة والشحن مصدرها جهازك وهي تقديرية — اعتبرها إرشادية لا قياسات دقيقة. يُقدَّم هذا التطبيق «كما هو» دون أي ضمان من أي نوع.</string>
     <string name="about_view_github">عرض على GitHub</string>
 

diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
@@ -255,7 +255,7 @@
     <string name="about_description">A lightweight app that keeps you informed about your battery — alerts at warning and critical levels, full-charge and high-temperature notifications, charging speed, and battery health insights. No bloat, no “power saver” gimmicks — just simple battery notifications.</string>
     <!-- %1$s is the developer name -->
     <string name="about_developer">Developed by %1$s</string>
-    <string name="about_open_source">Free and open-source software, licensed under the Apache License 2.0.</string>
+    <string name="about_open_source">Free and open-source software, licensed under the GNU General Public License v3.0.</string>
     <string name="about_disclaimer">Battery readings, health and charging figures come from your device and are estimates — treat them as guidance, not exact measurements. This app is provided “as is”, without warranty of any kind.</string>
     <string name="about_view_github">View on GitHub</string>
     <string name="about_github_url" translatable="false">https://github.com/almothafar/SimpleBatteryNotifier</string>

diff --git a/LICENSE → licenses/Apache-2.0.txt b/LICENSE → licenses/Apache-2.0.txt
@@ -162,7 +162,7 @@
       other commercial damages or losses), even if such Contributor
       has been advised of the possibility of such damages.
 
-   9. Accepting Warranty or Extended Support. While redistributing
+   9. Accepting Warranty or Additional Liability. While redistributing
       the Work or Derivative Works thereof, You may choose to offer,
       and charge a fee for, acceptance of support, warranty, indemnity,
       or other liability obligations and/or rights consistent with this
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2024-2025 SimpleBatteryNotifier Contributors
+   Copyright [yyyy] [name of copyright owner]
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
@@ -199,3 +199,4 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
+