Sleep Bug is described as 'One of the best rated white noise machines on the market.
Superior in sound contents: 24 scenes, 83 different sound effects and more than 300 different sounds ensure that everyone will find an ambience matching their needs' and is an app in the sport & health category. There are more than 50 alternatives to Sleep Bug for a variety of platforms, including iPhone, Android, iPad, Web-based and Android Tablet apps. The best Sleep Bug alternative is Blanket, which is both free and Open Source. Other great apps like Sleep Bug are Noizio, White Noise, Nature Sounds and Rainy Mood.