Every app blocker wants an account — which means uploading a list of the apps you're trying to use less. Quell has no account, no backend, no analytics. It runs on-device via Apple's Screen Time API, so that list never leaves your iPhone — there's no server to send it to. Block apps, sites and categories. Schedules, daily limits, strict mode you can't switch off mid-block. Custom block screen, home-screen widget, streaks, 18 badges, 7 languages.