QuizLock: Screen Time & Quiz

QuizLock turns the time you lose to scrolling into something you keep.

Choose the apps you lose time in and set a daily limit. When you reach it, QuizLock locks the app and asks a question. Answer it and you are back in. That is the whole idea — the phone does not just say no, it asks for something small in return.

WHAT YOU GET
• Screen-time limits for the apps you choose
• A lock screen with a real question, not a guilt trip
• 84,000+ questions across nine categories, in seven languages
• Vocabulary practice in seven languages
• Questions you get wrong come back on a spaced-repetition schedule
• Practice any time to bank minutes you can spend on a future lock
• Day streaks, with a protection that covers the day you forget
• Per-category accuracy, so you can see what you are actually weak at
• A morning summary and an evening reminder — both optional

YOUR DATA STAYS ON YOUR PHONE
Screen-time measurements, the list of apps you monitor and your quiz history are stored on the device. We have no servers and no accounts. You can export a backup file whenever you like.

IN A HURRY?
Watch a short ad to skip once, or spend minutes you earned by practising. Premium removes ads and adds automatic backup.

QuizLock is a digital wellbeing tool. Usage Access is used only to measure the apps you choose; the display-over-apps permission is used only to show the quiz.

Recent changes:

The lock screen now adjusts to fit long questions, so answers show without scrolling.
Fixed the "quiz can't open on its own" warning getting stuck on the home screen.
You can now rate QuizLock from Settings.
Fixed a lock-screen button that overflowed in longer translations.
Nearly 40,000 new questions: 500 more in every category and every language — the bank now tops 250,000.
Language trainer: 919 new words — now more than 3,000.