Sphinx: Screen Time Puzzles
Kevin Nguyen Productivity iPhoneiPadiPod touch
Sphinx: Screen Time Puzzles is a free Productivity app for iPhone and iPad by Kevin Nguyen. Rated 5.0/5 from 1 ratings. Requires iOS 17.0.
- Rating
- 5.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 10 MB
- Age 4+
- Updated
- Oct 21
- 2026 · v1.3
Screenshots
About Sphinx: Screen Time Puzzles
Most app blockers ask you to have willpower. Sphinx asks you to have two minutes and a working brain. Lock the apps that eat your evening. When you want back in, you don't tap "ignore" — you solve a brain puzzle. HOW IT WORKS 1. Pick the apps you want locked, and choose how long the lock lasts. 2. Open one of them and you hit the Sphinx shield instead. 3. Solve a puzzle to buy back five minutes. Solve more for longer. EACH UNLOCK COSTS MORE THAN THE LAST The first unlock in a lock window costs one puzzle. The second costs two. The third costs three. After that, you wait until the window ends. The price is on screen before you commit, so a long session never feels free. PUZZLES, NOT TIMERS • 2,499 mate-in-one chess puzzles, every one verified solvable • Number pattern puzzles if chess isn't your thing • Everything is solved on device, so no connection is needed NO ESCAPE HATCH There is no "just this once" button, no snooze, no early exit. A lock window runs until it ends. Apps inside one can't even be removed from your list until it does. PRIVATE BY DESIGN Sphinx never learns which apps you locked. Your selection is handled entirely by Apple's Screen Time framework and stays on your device. No account, no sign-up, no tracking. LIGHT AND DARK Pick either, or follow your phone. — Sphinx uses Apple's Screen Time permission to lock and unlock the apps you choose. It cannot see your activity in those apps, and it cannot see which apps you selected. Sphinx Pro is an auto-renewable subscription: $4.99 per month or $29.99 per year. The yearly plan includes a 7-day free trial for new subscribers; unless cancelled at least 24 hours before the trial ends, the yearly subscription begins automatically. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel it in Settings on your device. Privacy Policy: https://kevinnguyen2321.github.io/sphinx-privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
What’s new
Version 1.3 · Updated October 21, 2026
Improvements to the App Store listing.
App privacy
The developer, Kevin Nguyen, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Purchases: Purchase History
- Usage Data: Advertising Data
Used for: Developer’s Advertising or Marketing, Analytics, App Functionality
Alternatives to Sphinx: Screen Time Puzzles
Looking for apps like Sphinx: Screen Time Puzzles? Here are 6 similar apps on the App Store. The highest rated is ChessLock: Screen Time Control (4.8/5), and 5 of the 6 are free to download.
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Tub IPTV
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Brain Games: Screen Time Focus
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ChessLock: Screen Time Control
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Zenvi - Earn Your Screen Time
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UnTrap for YouTube
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Recall: Summarize & save
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Sphinx: Screen Time Puzzles | 5.0 / 5 (1 rating) | Free | October 21, 2026 | |
| Tub IPTV | – | Free | Sep 16, 2026 | Compare |
| Brain Games: Screen Time Focus | 4.3 / 5 (28) | Free | Oct 1, 2026 | Compare |
| ChessLock: Screen Time Control | 4.8 / 5 (4) | Free | Oct 16, 2026 | Compare |
| Zenvi - Earn Your Screen Time | 4.2 / 5 (12) | Free | Oct 28, 2026 | Compare |
| UnTrap for YouTube | 4.1 / 5 (519) | 4.99 USD | Oct 25, 2026 | Compare |
| Recall: Summarize & save | 4.5 / 5 (129) | Free | Sep 26, 2026 | Compare |