App Blockers
Far more effective than the native app limit features on iPhones and Android devices, these 3rd party app-blocking apps make it easier to stick to your habits and intentions — no willpower required!
Opal: An app blocker that makes it very easy to set up different app-blocking schedules and modes for yourself (for example, you can create a weekday evening schedule, or a “study session” mode, or a morning mode, etc).