Content rating
Everyone
10+
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Content rating
Everyone
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About this app

LOCK Timer - A Timer That Can Only Be Stopped with a Password

This timer app is for parents who want to manage their children's smartphone usage time.

When the timer ends, an alarm sounds, and it cannot be deactivated without entering the password.

■ Two Timer Modes

【Pre-Lock Type】
When the timer is activated, the screen is locked, and only this app can be used.
Set the timer before giving the smartphone to your child.

【Background Type】
Children can use the smartphone freely, but the timer is always displayed on the screen.
When the timer reaches 0, the screen locks, and a password is required.

■ Main Features

• Password Lock (4 digits) - Only parents can unlock it
• Overlay Timer Display - Displayed regardless of which app is open
• Always displaying remaining time in the notification bar
• Home screen widget
• 6 types of alarm sounds
• 7 types of theme colors
• Preset time (15 minutes to 2 hours) + custom settings
• Recording of usage history
• Timer continues after device restart
• Uninstall prevention function (optional)

■ Recommended for those who:

• Want to limit their child's YouTube/game time

• Want to enforce "just X more minutes"

• Want to set a time limit for handing over their smartphone

■ Safe Design

• No ads

• No internet connection (completely offline)

• No collection of personal information
Updated on
Apr 13, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
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Committed to follow the Play Families Policy

What’s new

- タイマーが終了するまで解除できない「LOCK Timer」体験を実現
- フルスクリーンオーバーレイで時間管理をしっかりサポート
- 4桁パスワードによる安全な解除で安心のペアレンタルコントロール
- 画面表示は使いやすい大きめ文字とやさしい配色
- 端末再起動後もタイマー状態を復元して継続利用できる設計
Content rating
Everyone
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App support

About the developer
久保 槙之介
colvet.technology@gmail.com
南区藤野4条10丁目8−13 札幌市, 北海道 061-2284 Japan