This app integrates with the Apple's Health app and saves your toothbrushing routines to the HealthKit.

It's simple as starting a timer. You'll get 3 seconds to get ready and then start with brushing your teeth. It's recommended to brush your teeth at least for 2 minutes. That's why, you'll get a haptic feedback every 30 seconds so you can change the side you're brushing, and once again when the timer reaches 2 minutes. Haptic feedback is different for "milestones" and completion. After you're done, tap the screen to stop the timer.

When running on iPhone, your screen will not go to sleep as long as the timer is running. You will also get haptic feedback, different for milestones and completion.

When running on a Watch using a device with always-on display, the screen will update the timer, even if it goes dim. On a device without always-on-display, the app is running in background and the app functionalities are not hindered in any way. You don't need to worry about timer getting paused.

No matter which device you run the app on, you'll get notified about milestones and finished timer via haptic feedback.