# JBM Dry Fire vs Dirty Knife Timer

The clearest difference is update cadence: Dirty Knife Timer at weekly against JBM Dry Fire's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

JBM Dry Fire ships an update every 4 months, Dirty Knife Timer weekly. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | JBM Dry Fire | Dirty Knife Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/jbm-dry-fire/id6504736162/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free | — |
| Size | 4 MB | 6 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [James Millard](https://appshunter.io/developer/1629691771) | [Shun Man Leung](https://appshunter.io/developer/1684190351) |

## What reviewers say

### JBM Dry Fire

[App page](https://appshunter.io/ios/app/jbm-dry-fire/id6504736162)

This app provides voice-guided dry fire drills for sports training. It automates staging and par time calculations for efficient practice sessions. Execute drills with a single button press.

**Highlights:** Voice-guided dry fire drills, Automatic staging calculations, Automatic par time calculations, Single button drill execution, Customizable drill parameters

**In-app purchases:** none


### Dirty Knife Timer

[App page](https://appshunter.io/ios/app/dirty-knife-timer/id6751469127)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JBM Dry Fire free?

JBM Dry Fire is free to download, with no in-app purchases.

### Is Dirty Knife Timer free?

Dirty Knife Timer is free to download, with no in-app purchases.

### Do JBM Dry Fire or Dirty Knife Timer have ads?

Neither JBM Dry Fire nor Dirty Knife Timer shows ads.

### Which is updated more often, JBM Dry Fire or Dirty Knife Timer?

JBM Dry Fire ships an update every 4 months, and Dirty Knife Timer weekly. Most recently, JBM Dry Fire was updated on October 24, 2026 and Dirty Knife Timer on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*