---
title: "Dirty Knife Timer - Reviews, Revenue and Downloads in Hong Kong SAR China | Apple App Store"
description: "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:  "
---

# Dirty Knife Timer — Hong Kong SAR China

![Dirty Knife Timer App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/49/e4/fd/49e4fd67-ed56-b2a0-792d-52d1a765f2cd/AppIcon-0-0-1x_U007epad-0-1-P3-85-220.png/434x0w.png)

**Developer:** [Unknown](https://apptail.io/developer/unknown-WJdd)
**Category:** Sports
**Rating:** N/A (0 ratings)
**Price:** Free
**Bundle ID:** defenceknife
**Store:** Apple App Store
**Country:** Hong Kong SAR China
**Version:** 1.5 (released 2025-09-02)
**Original Release:** 2025-08-26
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/hk/app/app/id6751469127)
**AppTail Page:** [https://apptail.io/app/dirty-knife-timer-RqHw/hong-kong](https://apptail.io/app/dirty-knife-timer-RqHw/hong-kong)

## Dirty Knife Timer Description
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.

## Dirty Knife Timer Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a4/de/10/a4de10df-151c-c01e-84b7-148867e11bbe/IMG_0307.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/8d/d0/45/8dd04530-508e-6ee1-be05-88adbfcfc8a2/IMG_0308.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/4a/5e/d4/4a5ed47b-6e70-0dc2-aff9-cad5af8d1f9c/IMG_0306.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/84/0f/cb/840fcb06-67ba-c17a-4079-092fb207297b/IMG_0305.png/1242x2688.png)







## Dirty Knife Timer Available In
- [Hong Kong SAR China](https://apptail.io/app/dirty-knife-timer-RqHw/hong-kong)
- [United States](https://apptail.io/app/dirty-knife-timer-RqHw/united-states)

---

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