πŸš€ Now in closed beta on Android

Earn screen time by learning.

LockDuck locks the apps you choose until your child answers a few quick questions. Less mindless scrolling, a little learning every day.

No accountsNo adsNo tracking
πŸŽ‰ +20 min earned
πŸ”’

Time to learn!

YouTube is locked. Answer to earn time.
What comes next?
3, 6, 9, 12, __
14
15
16
18
Question 2 of 3
🧠 Streak: 5 days
How it works

Three steps. Thirty seconds for kids.

Set it up once, then let it run quietly in the background.

1

You pick the apps

Choose YouTube, Instagram, games, anything that eats the evening. Settings are protected by your PIN.

2

Kids answer to unlock

When they open a guarded app they get quick questions: maths, science, GK, English and puzzles.

3

Right answers earn time

You decide how many minutes each quiz is worth. When time is up, the lock comes back.

Features

Built to be hard to cheat, easy to live with.

The things parents actually ask for.

♾️

Endless maths and puzzles

Questions are generated fresh every time, so your child never runs out and never just memorises answers.

🧠

Smart repetition

Topics your child finds tricky come back more often. Ones they've mastered take a break.

πŸ“±

Split-screen and pop-up proof

Shrinking an app into a floating or picture-in-picture window doesn't dodge the lock.

⏱️

You set the rules

Choose how many minutes 3, 5, 10 or 20 correct answers are worth.

πŸ“Š

Learning report

See which subjects are strong, what was missed most and how the streak is going.

πŸ”

Survives restarts

The guard restarts when the phone does, and uninstalling it needs a deliberate extra step.

What kids practise

A little of everything.

Pick which subjects appear. Mix and match for each child.

βž• Mathsunlimited
🧩 Puzzlesunlimited
πŸ”¬ Science
🌍 General Knowledge
πŸ“– English
Private by design

Your family's data stays your family's.

LockDuck has no accounts and doesn't ask for internet access, so nothing about your child leaves their phone.

Read the privacy policy
  • No sign-up, no email, no login
  • Progress is stored only on the device
  • No ads and no analytics
  • Every permission explained in plain words
FAQ

Good questions.

Quick answers for parents.

Which phones does it work on?

Android phones. We're testing across several brands including Google Pixel, Vivo and OnePlus. An iPhone version isn't available yet.

Can my child just uninstall it?

LockDuck uses Android's Device Administrator option, so uninstalling requires turning that off first. A determined child can still find ways, so LockDuck works best alongside a conversation about screen time.

Why does it need so many permissions?

Each one has a single job: seeing which app is open, showing the lock on top of it, keeping the guard running and restarting after a reboot. The Accessibility service never reads what's on screen. See the privacy policy for details.

Does it collect my child's data?

No. There are no accounts and no analytics, and the app doesn't have internet permission. Progress is stored only on the phone.

How much does it cost?

It's free during the beta. We'll share pricing before the public launch.

Do the questions repeat?

Maths and puzzles are generated on the spot. Other subjects use a growing question bank, and the app tracks what your child has already seen so repeats are limited.

Get started

Ready to make screen time count?

LockDuck is in closed testing on Google Play. Public release is coming soon. Ask for beta access and we'll be in touch.

Request beta access