Sleep Sounds - Rain Sounds and Relax Music is an app that you can use to play dozens of different sounds that can benefit you in different ways. The app includes sounds that'll help you sleep better, relax, focus at work, etc.
Use the main menu to find different presets that pertain to anything from work, to rain on rooftops, to electric storms or summer rain. You can also create a mix of sounds. To do so, add or remove different sounds, adjust the volume of each individual sound, and save the changes of your customized preset.
One of the most interesting aspects of this app is that it lets you set a chronometer that turns off the sound automatically. This feature is especially useful when you're creating a relaxing ambiance but you don't want the sound to stay on all night. It can also be useful if you're at work and you use it as an alarm for when your shift is over.
Sleep Sounds - Rain Sounds and Relax Music is an excellent sounds app that can help you relax as well be more productive at work. The premium version of the app can be purchased in the options menu and gives you access to even more sounds. You can also mix these sounds and create your very own compositions.