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White Noise Lite
Name: White Noise Lite
Compatibility: Android 2.2 and up
White Noise Lite is a free app which can block out daily distractions which keep you from getting a moment's peace.
The app generates 'white noise' over a range of frequencies to stop your sleep being interrupted by sudden sounds if the environment is too quiet -- as well as allowing you to listen to noises that calm you.
Some of the tracks available in the free version include heavy rain, ticking clocks, crickets and beach waves.
Via: Google Play
Image credit: Google