Perfect

Great app. Couldnt ask for more. You can pick up to 4 different soft sounds and adjust their levels or even put them on a timer to fade in or out. Im using rain, thunder and a beach as a sleepy time mix. Also, you can publish your mixes or find already published mixes. It really helps me sleep. The website is free and you wont have to listen on iPhone speakers if you do it that way but I consider buying the app like giving a tip for such an awesome service. Really helps with my insomnia.

Somneverist about Go Mix It - ambient sounds