It's great to relax and sleep to the sound of a good rain, but it doesn't rain every day, and when it rains sometimes the rain ends quickly. But now with the “good rain” app you can sleep and relax every day.
Don't worry about your phone's battery, as the app doesn't consume much of your battery, you can program it to close the app for a certain time, so when it turns off you'll be sleeping and saving battery.