Your own decks. Biology, vocab, case law, anything. Cards you miss come back more often.
For anyone who studies with a phone nearby
Earn your scroll time.
Set a daily limit for the apps that eat your day. When it runs out, the app locks. Answer one of your own flashcards to get 2 more minutes.
Download on theApp Store
3 days free · iPhone, iOS 17.4 or later
One card. Two minutes. No shortcuts.
FlashLock uses Apple's Screen Time, so a locked app stays locked. There's no “ignore limit” button. You get back in by learning something.
How it works.
Set it up once. After that, every time you reach for your phone, you review a card.
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1
Set your limits
Pick up to 9 apps and give each one a daily budget.
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2
The app locks
When the time is up, Screen Time shields it until midnight.
Instagram is locked
Answer a flashcard in FlashLock to earn 2 more.
Earn 2 minutes
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3
Answer to get back in
Right answer: 2 more minutes. Wrong answer: just the next card.
Made for real studying.
A plan that fits you. Tell it what you're studying for and how much you scroll, and it sets the limits and a daily card goal.
Strict mode. Raising a limit takes 5 correct answers, so late-night you can't quietly undo daytime you.
Private by design. No account, no ads, no tracking. Your cards and limits stay on your iPhone, and Screen Time never tells us which apps you picked.
Pricing
Try it free for 3 days.
Full access from the first minute. Cancel any time in Settings, before the trial ends, and you pay nothing.
- Limits on up to 9 apps
- Unlimited decks and cards
- Strict mode and practice mode
- English, Japanese and German
Start 3-day free trial
3 days free, then $2.99 a week. Cancel anytime.
US prices. The App Store shows your local price.
Questions.
What happens when I answer wrong?
Nothing bad. You get the next card. Only a correct answer unlocks 2 minutes, and you can try as many cards as you like.
Why does FlashLock need Screen Time access?
It's the only way an iPhone app can lock other apps. Apple gives FlashLock anonymous tokens for the apps you pick. It can't see their names, your browsing or your messages.
Can I stack minutes for later?
No. Earned time is used right away, and you earn again the next time the app locks. Limits reset at midnight.
Do I need to make cards first?
Yes, a few. Setup walks you through your first deck, and four cards with different answers is enough to start unlocking apps.