2x Battery

Extend your battery life

Purify

Extend your Android battery life

CPU Tuner

The most complete battery manager

Battery Guru

An app that shows your device's battery information

AutomateIt

Give your phone some work to do

Battery Sound Notification

Configure audio notifications that report on battery status

Battery Doctor

Manage your battery life and save on battery consumption

Kaspersky Battery Life

Easily extend your battery life

DU Battery Saver

Extend your battery life and improve its performance

AccuBattery

Unleash the full potential of the battery on your Android device

Super Battery

Extend the life of your phone's battery

Pika!

Customize the loading screen of your Android

Brevent

An app to control background processes

MTK Engineering Mode

Access the secret and hidden menu of your MTK mobile

Repair Battery Life

Extend the life of your smartphone battery

Bright Day

Adjust the brightness of the screen to the daytime hours

Instructables

All the tutorials you can think of

iFixit

An all-purpose repair manual

Samsung Members

Make the most of your Samsung device

Plant App

Learn to identify and care for plants

Wikipedia

The biggest reference work in the palm of your hand

Infocar

Digital car diagnostic tool

Shroomify

Discover all the secrets of mushrooms

Google Arts & Culture

Google brings art to your smartphone

Picture Insect

Insect identifier for cell phones

HiCare - Huawei

Huawei post-sales service app

ElectroDroid

Resources for electronics professionals and enthusiasts

wikiHow

Consists of tens of thousands of explanatory tutorials

Kiwix

The offline version of Wikipedia on your phone

Plant Care Reminder

Learn to take care of your plants

Rock Identifier

Identify rocks and discover the rocks around you