DU Battery Saver - DU Battery Saver, get up to 50% more battery life for your Android phone. Battery Saver learns how you use your phone, then creates smart profiles that match your settings to your needs while getting more life from your battery.
WakesApp - The simplest way ever to send reminders to friends
Accubattery - Monitor's battery capacity through the use of science
Grailed - Buy and sell used menswear
Power Battery - Power Battery, as the most professional battery saver app, could get up about 60% more battery life for Android phones or tablets.
Badger - A fast key-value store written natively in Go