Try to extend battery life by changing always-on mobile/wifi data to periodic sync (meaning it disables your mobile data and/or Wifi, then checks your accounts every X minutes).
Requires Root on Android 5.0+
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
This version requires Android 2.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.