# Dirty Knife Timer

> Dirty Knife Timer (iPhone/iPad app by Shun Man Leung.)

- Source: https://appshunter.io/ios/app/dirty-knife-timer/id6751469127 (this page in markdown: same URL + `.md`)
- Developer: [Shun Man Leung](https://appshunter.io/developer/1684190351)
- Category: Sports
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 6 MB
- Languages: American English
- Released: 2025-08-26
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/dirty-knife-timer/id6751469127/reviews.md

## What is Dirty Knife Timer?

This application is used to train quick-draw knife techniques, recording draw speed as a timer to enhance self-defense ability.

We utilize the iPhone’s accelerometer to achieve this.

Instructions:

1. Set your phone’s volume to maximum.
2. Set the countdown timer (can be a fixed time or random).
3. During the countdown, do not turn off the screen. Place the phone in your pocket.
4. When you hear the beep, immediately draw your knife.
5. The moment you come to a complete stop after drawing, the app will use accelerometer data to determine that you have finished the draw, thus calculating the time it took to draw the knife.


Thank you to Matei Florin for inspiring me.


## Version history (last 2 releases)

### 1.5 — 2025-09-02

Tap "Update" for a better experience.
This update version with more detailed data results on draw speed and reaction speed.

### 1.0 — 2025-08-26

No release notes.

## More apps by Shun Man Leung

- [WB Body](https://appshunter.io/ios/app/wb-body/id6448261571)
- [Vo2max靜態推算](https://appshunter.io/ios/app/vo2max/id6745766162)
- [柔術計分板](https://appshunter.io/ios/app/id6747419999)

All apps by Shun Man Leung: https://appshunter.io/developer/1684190351

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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 2026-05-19.*