ClusterTune

ClusterTune sets maximum CPU and GPU frequencies on Android handhelds.

[!WARNING] Changing CPU limits can affect stability, performance, temperature, and battery life. Start with tested values and use Stock to restore normal limits.

Lower CPU limits can reduce power use, heat, fan noise, and battery drain. Games limited by the GPU may also gain thermal or power headroom. This only caps clock speed and does not undervolt the CPU or replace its governor.

Features

• Support for rooted Android 12+ devices through su
• Independent maximum frequency controls for each CPU cluster and supported GPUs
• Profiles that can be created, reordered, imported, and exported
• Bundled presets and a Stock profile for supported processors
• Automatic app profiles using saved profiles or custom frequency values across one or more displays
• Quick Settings access to pick, tune, or cycle profiles
• A left edge gesture that opens profile controls over the current app
• Optional profile automation after boot and while asleep
• A history of automatic profile switches

Compatibility

Version 1.0 adds support for rooted devices, expanding compatibility beyond AYN and Retroid hardware.

Method	Devices
PServer	AYN and Retroid devices with the built in PServer service, except Odin 2 Mini
Root	Any Android 12+ device with a working su shell

Detection tries PServer first, then Root. The Odin 2 Mini must use Root. If neither method is available, tuning cannot be applied.

Install

Download v1.2.2 and install ClusterTune-v1.2.2.apk.

Android may ask the browser or file manager for permission to install the APK. Install downloaded updates is separate and optional. It is only needed for updates installed from inside the app.

Setup

Execution method detection runs on first launch. Approve the su request if Root is selected. Any missing access is listed with a shortcut to the correct Android settings page.

Access	Purpose
Display over other apps	Opens profile controls over the current app.
Accessibility	Detects visible apps immediately for automatic profiles.
Notifications	Keeps app profile and sleep automation active.
Usage access (optional)	Improves recent app sorting when choosing an app.

Choose a bundled profile or create one. Stock restores the device's normal maximum frequencies.

Screenshots

Main app	Profile editor

Quick tuner overlay	Settings

Troubleshooting and support

• No execution method found: confirm that PServer is available or that the root manager provides su, then run detection again from Settings.
• Profile controls missing: check Display over other apps.
• Assigned app not switching profiles: confirm its assignment, Accessibility, and Notifications.

For help, open a GitHub issue with your device model, Android version, execution method, and the relevant log details. Please do not include private data.

Build and test

Building requires JDK 17 and Android SDK 34:

./gradlew testDebugUnitTest
./gradlew lintDebug
./gradlew assembleDebug

The debug APK is written to app/build/outputs/apk/debug/.

License and attribution

Distributed under the GNU General Public License v2.0.

The RootExec/PServer command execution code is based on O2P Tweaks by FeralAI, also licensed under GPLv2.

The project was inspired by the Odin 3 CPU Underclock scripts and the original idea shared by Reddit users u/twoohfive205 and u/JoaozaoS.

AI assistance disclosure

AI assistance was used while building this project. I reviewed the code throughout development and understand how the app works and what it does.