Quick! Reaction Speed Test

How fast are your reflexes?

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Three senses × two actions, six modes to push your limits. Millisecond-precise timing reveals your true reaction speed — and tracks every improvement. Quick! measures your reaction time down to the millisecond. Wait on the ready screen — the cue appears at a random moment, and you react as fast as you can. Six modes combine three senses with two actions: • Visual: the instant the screen changes colour • Audio: the instant the tone sounds • Haptic: the instant the phone vibrates × Tap the screen, or flick the phone (quick-draw style) Five trials per round give you your average, best and worst, plus a performance grade. Jumping the gun — reacting before the cue — doesn't count and re-runs, so every number is real. Why trust the numbers? Quick! times everything on the system's high-precision monotonic clock, subtracting the stimulus's true onset from your response's hardware timestamp — eliminating the tens of milliseconds of lag most apps carry. You can even measure real effects like "audio is faster than visual." ■ Six modes: visual / audio / haptic × tap / shake ■ Millisecond-precise timing ■ Full history with trend charts to track your progress ■ Traditional Chinese, English and Japanese ■ Sleek dark, e-sports-style interface Push your limits and see how fast you really are.

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The developer, CHENG HSUAN HSIEH, 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.

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    Accessibility

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    Information

    Seller
    CHENG HSUAN HSIEH
    Size
    3.6 MB
    Category
    Games
    Compatibility
    Requires iOS 18.6 or later.
    • iPhone
      Requires iOS 18.6 or later.
    • Mac
      Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.6 or later.
    Languages
    English and 2 more
    • English, Japanese, Traditional Chinese
    Age Rating
    4+
    Copyright
    © 2026 Nekosoft
  • Developer Website
  • Privacy Policy

    • More by CHENG HSUAN HSIEH

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