AppStore: App for tracking and posture correction
You can get a FREE lifetime membership to the Posture Pal Pro app for iOS and Mac! This app uses the motion sensors in your AirPods to track and correct your head and neck posture, reminding you to sit up straight. To get the Pro version for free, open the Posture Pal app on your device. When the banner offering a free 3-day subscription appears, tap it, then find and select the "All Plans" (Все планы) option. There you will see the "Lifetime" (Пожизненное) membership option with a cost of $0.