4rem for Sleep is a lifestyle app developed by Panda Bear Studio LLC, available for iPhone users. The app aims to address the issue of excessive screen time before sleep by transforming your smartphone into a "dumbphone" through the use of the 4rem Lock device. This unique approach allows users to limit distractions while still having essential phone functions like alarms accessible. By automating app locking based on routines or manual intervention, users can create a healthier bedtime routine.

With 4rem for Sleep, users can break the habit of mindlessly scrolling before bed, promoting better sleep hygiene. The app offers features such as customizable app blocking, wireless and battery-free 4rem Lock, a sound library for relaxation, and a privacy-focused approach to data management.