REACTRA
Perceive. Calibrate. React.
About
Engage in fast-paced visual experiments designed to test and improve your attention and reaction time. Use your hands and eyes to interact with unique challenges, compete with friends, and track your personal progress.
What's New in REACTRA
1.0.2
October 2, 2026
New games and a smoother, sharper camera. - 4 new games: Go / No-Go and Peripheral Flash (Vision), Color Call and Side Switch (Camera) - Move & Hold rebuilt: 6 rounds, longer holds, a steadiness score, and it knows if your hand really stayed put - Camera games now line up exactly with your camera, so zones register where you reach - Fairer Sequence Reach, Color Call, and Timing Strike - Record shows bigger, and your actual video now saves and plays back - Form Analysis: upload button and markers fixed, plus frame-by-frame stepping - Bigger, higher-contrast game screens - Target Strike retired - Bug fixes and polish
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FAQ
What is REACTRA?
REACTRA is a collection of visual experiments designed to test and improve your attention and reaction time. It uses your device's camera and touch input for interactive gameplay.
How does REACTRA work?
The app presents various visual challenges that require you to quickly spot changes, track moving objects, or maintain precise movements. Each experiment is designed to be fast and engaging.
Can I challenge my friends in REACTRA?
Yes, you can challenge friends by sharing a challenge code. They will then play the exact same round and experiment, allowing for direct comparison.
What kind of experiments are available in REACTRA?
REACTRA features over 20 experiments, including 'Color Call' where you stay in a green zone, 'Side Switch' to change sides quickly, and 'Move & Hold' to freeze your hand still.
Does REACTRA offer daily challenges?
Yes, REACTRA includes a daily Community Challenge that everyone plays together, as well as a weekly 'Impossible Round' for a near-impossible test of skill.
How does REACTRA track my progress?
REACTRA Records monitors your fastest reactions, best accuracy, and highest level passed. This allows you to see your improvements and set new personal bests.
Is REACTRA suitable for all ages?
REACTRA has an age rating of 4+, making it accessible for a wide range of users. It's built for athletes but enjoyable for anyone looking to train their eyes.
Does REACTRA have ads?
No, REACTRA is ad-free, allowing for an uninterrupted experience during its visual experiments and challenges.