Do you have trouble getting to sleep?
If so, this free app is for you.
To use it, just lie down in your bed and select the desired image. Let the high quality sound of natural elements take you away.
It even works if you suffer from tinnitus.
*Forest with a river
This app requires NO INTERNET CONNECTION to work and thus will work even if in flight mode.
The app is 29mb large so watch out for possible download costs, preferably use Wi-Fi.