Battery

Battery Alarm PRO is a $2.49 Android app with no ads that speaks or rings when your battery reaches the low and high levels you set. Several reviewers have used it for years; the…

AccuCharge is a free Android app that shows live charging current and watts on an AMOLED-style charging screen and always-on display, with ads and a paid upgrade. Several reviewers think it speeds up charging,…

Battery Guru is a free Android battery monitor that estimates capacity and health, measures charging current, and adds alarms, widgets and an always-on display. Several reviewers praise the detail; the common complaints are ads,…

Thermal Monitor is a free, ad-free Android app that shows your phone’s temperature and throttling state in a floating widget, with a one-time Premium upgrade. Several reviewers use it while gaming; several say they…

Full Battery Charge Alarm is a free Android app that rings when your phone reaches a charge level you set, with an optional low battery alarm. Several reviewers use it to stop overcharging; many…