Battery guardian
https://www.apkmirror.com/apk/samsung-electronics-co-ltd/battery-guardian/battery-guardian-4-1-06-release/
Good guardians ( samsung )
https://www.apkmirror.com/apk/samsung-electronics-co-ltd/galaxy-labs/galaxy-labs-5-5-04-release/samsung-good-guardians-the-new-name-of-galaxy-labs-5-5-04-android-apk-download/