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Wattz

A real time battery power consumption and charging indicator in your status bar
New in version 1.20
• Add Spanish language translations (contributed by frdarko)
Wattz is a simple battery indicator. It shows one of several real time battery metrics right in your status bar. Open the app to see detailed battery metrics and and edit your settings.

Notification permissions are required to show the indicator in the status bar. Please open the app once to automatically start the indicator service.

This app respects your privacy!
• No unnecessary permissions
• No ads
• No collection of user data of any kind
• No sharing data with third parties

Detailed battery metrics include:
• Power (watts)
• Current (amps)
• Voltage (volts)
• Energy Level (watt-hours and amp-hours)
• Temperature (celsius)
• Charge Level (percent)
• Is Charging (yes/no)
• Charging Since (date/time)
• Time to Full Charge (duration)

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.20 (20) suggested Added on Aug 10, 2025

    This version requires Android 9.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • dubrowgn.wattz.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 0.7 MiB PGP Signature | Build Log

  • Version 1.19 (19) - Added on Jul 03, 2024

    This version requires Android 9.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • dubrowgn.wattz.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 0.7 MiB PGP Signature | Build Log

  • Version 1.18 (18) - Added on Feb 24, 2024

    This version requires Android 9.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • show notifications
      Allows the app to show notifications
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • dubrowgn.wattz.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 0.7 MiB PGP Signature | Build Log