# Quick! Reaction Speed Test — How fast are your reflexes?

> How fast are your reflexes? (iPhone/iPad app by CHENG HSUAN HSIEH.)

- Source: https://appshunter.io/ios/app/quick-reaction-speed-test/id6797248180 (this page in markdown: same URL + `.md`)
- Developer: [CHENG HSUAN HSIEH](https://appshunter.io/developer/1725717008)
- Category: Games
- Price: Free
- Age rating: 4+
- Requires: iOS 18.6 · 3 MB
- Languages: English, Japanese, Chinese
- Released: 2026-08-06
- Data updated: 2026-09-07
- User reviews in markdown: https://appshunter.io/ios/app/quick-reaction-speed-test/id6797248180/reviews.md

## What is Quick! Reaction Speed Test?

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.


## Version history (last 1 release)

### 1.0 — 2026-08-05

No release notes.

## More apps by CHENG HSUAN HSIEH

- [水族自動滴定](https://appshunter.io/ios/app/id6737984238)
- [3D室內掃描](https://appshunter.io/ios/app/3d/id6779056101)
- [找出不同的顏色](https://appshunter.io/ios/app/id6790485116)

All apps by CHENG HSUAN HSIEH: https://appshunter.io/developer/1725717008

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*