3C Toolbox Pro & Battery Monitor Pro APKs to unlock keys

Starting with 3C Toolbox Pro v2.0 and 3C Battery Monitor Widget Pro v4.0, the pro APK is an unlock key to the main app version (3C Toolbox). Unlocking issues, please read here.


Existing installation of 3C Toolbox Pro or 3C Battery Monitor Widget Pro versions will update and work as usual, at least until Ocotober 2019 (may be changed without prior notice).

With new installation, the Pro APK will act as an unlock key for the free version, and its icon will disappear when configured (please run pro app once after installing it).



  • You'll get better and faster support.

  • A few times per month a user complains that he bought the pro version but still have ads, and no extra features.

  • When providing updated APK to test bug fixes, I'll only have to provide the same APK. 

  • Building/testing/publishing 2 apps which are actually identical is time-consuming, and I have to maintain 3 other apps with the same model.

  • Paid versions suffers from excessive wake-ups (monitoring with high unlocked refresh rates), this will disappear with pro being an unlock key.

  • In short, everything is much simpler and faster, everything will be better.

Migration instead of clean install?

  • If you're running the pro version, also install free version. Make sure to install latest versions from Play Store.

  • Export app settings (in app settings, help and support), it also exports all your existing widgets.

  • Open free version, app settings, help and support and import app settings. App will restart.

  • Clear Pro APK data, freeze it and unfreeze it (you can do that later if suitable, however anything configured will run in both apps after last step).

  • If using the Toolbox with Xposed, activate new module and de-activate key module and reboot.

  • Things that needs manual handling:

    • Quick settings: those will need to be added manually again.

    • Widgets: Add the same widgets you used and load their settings. Graphics widgets will restore historical data as well.

    • Permissions and special permissions: None will be granted, which may impact various features of the app, most will be requested when opening app's various features.

    • BATTERY_STATS, READ_LOGS or WRITE_SECURE_SETTINGS on non rooted devices will have to be manually granted again using ADB.


Should you migrate now?

  • To ensure new installs use the new model, I had to remove Google's auto-backup (to your Google drive, if you have one). If you use that feature, you might want to migrate now.
  • If you plan on getting a new device by October 2019, just wait for that time to do a clean install.

  • The unlock key will be updated one last time beginning of 2020 and will no longer offer its UI or services but only unlock the main app. 

  • If you don't migrate before that time you may loose settings (the unlock key will auto-export its settings once, however widget configurations will be lost).

  • I've successfully migrated all my devices using above method, but there might still be problems I've not noticed.



  • Until October 2019, the pro APK will have both the pro features and the unlock key mechanism, so that user can migrate at their own pace.

  • Starting in October 2019, the pro APK (unlock key) will no longer be updated, I will track bugs and issues only from the main app.

  • Beginning of 2020 the pro APK will be an unlock key only.