Let Baby Stop Crying! is a free Android app developed by Wu WeiYung and falls under the Lifestyle category with a subcategory of Health & Fitness. The app claims to help parents calm their crying babies by playing a specific sound.

The app interface is simple with only one button labeled "start". When pressed, the app plays a sound described as "murmur..murmur..." and the user is instructed to wait for up to 3 seconds for the baby to stop crying. Once the baby stops crying, the user can press the button again to stop the sound. The app doesn't provide any additional information or guidance on how to use the sound effectively, and there is no information on the source or nature of the sound.