The chat app you can only use when you have less than 5% battery.
Die together in a chatroom on your way to offline peace.
Battery Indicator is a macOS app that shows the remaining battery time in your menu bar.
Greenify help you identify and put the misbehaving apps into hibernation when you are not actively using them, to stop them from lagging your device or leeching the battery, in a unique way! They can do nothing without explicit launch by you or other apps, while still preserving full functionality when running in foreground.