Reaction: Press and Hold
Beyond your limits
Free
Measures the moment you lift your finger, not the tap, for a cleaner reaction time. Anticipation guard and frame-accurate timing included. All data stays on device.
Reaction measures the moment you LIFT your finger, not when you tap. By removing the travel time of moving your finger to the screen, it gets closer to your pure reaction time.
Features
- Hold, then release the instant the signal appears. Release-time measurement
- Frame-accurate timing to minimize display latency
- Anticipation guard. Releases faster than humanly possible are rejected
- Per-session average, best, and consistency (standard deviation)
- Trend chart and your personal reaction-time distribution
- Export your results to CSV
- Everything stays on device. No data collection, tracking, or ads
- Works on iPhone, iPad, and Mac
A note on accuracy
Any software-based tester has a small, unavoidable delay (typically under one frame) from the display pipeline. Treat results as a consistent way to track your own trend over time, not as a lab-grade absolute measurement.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, One Choi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- One Choi
- Size
- 574.5 KB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © One Choi 2026