The most popular screen on/off app. Reviewed by LifeHacker, MakeUseOf, TheNextWeb, Gizmodo and many others …
Gravity Screen APK KEY FEATURES
• Pocket Sensor: Turns the screen off if your phone is in your pocket.
• Table Sensor: Detects your phone is lying on a table and turn it off if not in use.
• Turn Screen On by Motion: If the screen is off and it’s facing up the device can be woken up by moving it.
• Keep Screen On by Motion – Rise to Wake: It keeps the screen on while you are watching the screen. It relies on the small movements of your hand while holding the device.
• Smart Lock support: It’s a workaround to make the Smart lock feature work fine on devices with Lollipop.
• Locale plug-in for: Tasker, Llama and others
Also Download Ampere APK for Android.
UNLOCKED by IN-APP PURCHASE
• Better performance
• Widgets, Shortcuts
• Wider range for Rise to Wake Timeout
• Wider range for Table Sensor
• Suspend in Landscape mode
• Exclude Apps option
It should be not significant. I experienced about 6 per cent extra consumption on the test device. However it can be much higher by often using the Rise to Wake feature. Thus, keep your phone face down if you want to save energy.