"Расписание звонков" is a free Android app developed by Лаборатория Курылевых that shows how much time is left before the start or end of the next lesson or break. The app is designed for forgetful students who often ask, "When is the next bell?" With this app, they can easily keep track of their schedule.

The app is also useful for teachers who need to demonstrate the time left before the end of a lesson, especially during tests or exams. The app's display is visible from the back of the classroom. Parents can also use the app to call their children during breaks and make sure they're on schedule.

"Расписание звонков" is a simple and convenient app that helps students and teachers keep track of their schedule. The app's user interface is easy to navigate, and it's available for free on the Google Play Store.