Wo.Audio = Wonderful Audio. It contains 3 categories: Relax,Sleep and Hypnosis.
Contains a large of the natural audios, musical instruments audios and combination of different audios, and each of audio frequency was be optimized, it helps to relax and sleep.

Audios (part):
√ Droplets hitting the window
√ Spring, bird tweet, guitar
√ Wafting in the boat
√ Lightsome, gently
√ GuZheng, chinese style
√ Running water, near
√ Cheerful frame of mind
√ Moonlight, guitar
... ...
Tips:
1. Support for 320 x 480, 480 x 800, 480 x 854 resolution only.
2. It is better to wearing headphone.
3. This app capacity about 50M, so it install in the SD card default.