A new voltage control and CPU adjuster app is in the city...
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IF THE APP DOESN'T WORK FOR YOU, PLEASE CONTACT ME FOR SOLUTION
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For root users, this app allows you to create and automate CPU and GPU via the Profile manager.
For non root users, you're able to get information about the CPU (governor, speeds, etc).
You can define profiles which include:

- CPU governor
- Max CPU Frequency
- Min CPU Frequency
- CPU voltages for all frequencies (if kernel supports it)
- I/O Scheduler
- GPU frequencies and voltages (if kernel supports it)
- Charger voltages (if kernel supports it)

You can define profiles which are automatically activated on these conditions:

- Battery low
- High temperature
- Screen on/off
- Charging
- Connected to PC
- Voice call started

Also, you can view CPU information, like duration of time CPU spends in specific state, governor max/min CPU speed and much more.

Used permissions:
- Write external storage: To backup profiles
- Receive boot completed: To automatically start service on boot (enable in settings)
- Read phone state: To automatically detect voice call start/stop
- Internet: Added small ads (via Google Ads)
- Billing: For donation control (you can purchase PRO version inside the app)

If you have problems or issues with the app, please, send a logcat.

Tested with:
- Samsung Galaxy Note (N7000) with Android 4.1.2
- HTC Desire with CM7
- LG Nexus 4 (not rooted)

Free version includes Ads, it's limited to 3 profiles and isn't capable of making backup of your settings.
You can buy the full version inside the app in order to remove the Ads and get full app capabilities.
Please, before giving us low rating, contact us via email or post a comment with issues you have in the XDA thread.

In App billing allows users to

Remove Ads
Unlimited number of profiles

Recent changes:
Added User Data policy inside the app