Sphinx: Screen Time Puzzles
Brain puzzle app blocker
About
This app helps you regain control of your screen time by locking distracting applications. Instead of simply ignoring timers, you solve engaging puzzles to access your apps, with increasing difficulty for repeated unlocks. It's designed for privacy, keeping your app usage and selections on your device.
What's New in Sphinx
1.3
October 21, 2026
Improvements to the App Store listing.
Subscriptions & In-App Purchases
Sphinx Pro
Unlimited access to unlock your apps.
Developer apps
FAQ
How does Sphinx work to block apps?
Sphinx uses Apple's Screen Time framework to lock the apps you select for a chosen duration. When you attempt to open a locked app, you are presented with a brain puzzle instead of a simple timer.
What kind of puzzles does Sphinx offer?
Sphinx features two types of puzzles: 2,499 verified mate-in-one chess puzzles and number pattern puzzles. All puzzles are solved on-device, requiring no internet connection.
Is there a way to bypass the puzzles in Sphinx?
No, Sphinx is designed with no escape hatch. There is no "just this once" button, snooze, or early exit option. Lock windows run until they end, and apps cannot be removed from the lock list during this time.
How does Sphinx handle privacy?
Sphinx is private by design. It never learns which apps you've locked, and your selections are handled entirely by Apple's Screen Time framework on your device. No account, sign-up, or tracking is involved.
What are the pricing details for Sphinx Pro?
Sphinx Pro is an auto-renewable subscription available for $4.99 per month or $29.99 per year. The yearly plan includes a 7-day free trial for new subscribers.
How do I cancel my Sphinx Pro subscription?
You can manage or cancel your Sphinx Pro subscription in your device's Settings. Auto-renewal must be turned off at least 24 hours before the end of the current period to prevent automatic renewal.
What devices is Sphinx available on?
Sphinx is currently supported on iPhone devices.
How often is Sphinx updated?
The latest version of Sphinx is 1.3, and it was last updated on October 21, 2026. This indicates a relatively recent update cycle.
