Reflex Reaction Timer

Put your reactions to the test with Reflex. Tap to start, wait for the area to turn green, then tap as quickly as you can. The wait changes each round, so stay focused: tapping before green counts as a false start. YOUR SESSION AT A GLANCE See your latest reaction time, personal best for the current session, average, and recent attempts. Reset your results whenever you want to start fresh. SIMPLE AND FOCUSED A clean, dark interface keeps your attention on the signal. No countdown, sound, or vibration gives away when green will appear. TOUCH-DOWN TIMING Timing starts from the screen presentation time reported by the system and ends when your finger touches the screen, rather than when you lift it. FEATURES • Random waiting intervals • False-start detection • Reaction times displayed in milliseconds with one decimal place • Latest, best, and average results • Recent attempts and a reset option • English, German, and Simplified Chinese • Works offline, with no account required • Supports iPhone and iPad Results are kept for the current app session only and are not saved between launches. Measurement accuracy depends on the device, display, touch sampling, and system conditions. Displaying one decimal place does not imply 0.1 ms accuracy.