You can select two or more sounds at the same time such as one of the "Ocean Waves" buttons as well as a "Wind Chimes" button. However you cannot play multiple sounds from one category for example "Singing Birds" together.

Features:

- optimized for battery usage
- simple design high quality sound
- different nature sounds (include ocean waves rain sounds birds chirping frogs)
- sleep timer
- relaxation for human brains
- only good quality nature sleep sounds
- best relaxing sounds of nature Free App
- 26 different sound (you can play 7 sounds at the same time)