# DryFire Trigger Unit vs Zef

The clearest difference is rating: Zef at 4.6 against DryFire Trigger Unit's 3.0. Zef also leads on update cadence (fortnightly vs every 3 months) and ratings volume (41 vs 1). DryFire Trigger Unit's advantage is in-app purchases (none vs 3) and iOS requirement (8.0 vs 15.0). On price and ads there is nothing between them.

Both are free to download. Zef sells 3 in-app purchases, starting at $6.99 per month. DryFire Trigger Unit asks for nothing beyond the download.

Zef holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Zef has 41 ratings behind it against 1, so its average is the more settled of the two.

DryFire Trigger Unit ships an update every 3 months, Zef fortnightly. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | DryFire Trigger Unit | Zef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/dryfire-trigger-unit/id1291827365/reviews) | **[4.6 (41 ratings)](https://appshunter.io/ios/app/zef/id1447673572/reviews)** |
| Number of ratings | 1 | **41** |
| Positive reviews | — | 90.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 16 MB | 43 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Wordcraft International Limited](https://appshunter.io/developer/294338798) | [David Kieffer](https://appshunter.io/developer/1341935892) |

## What reviewers say

### DryFire Trigger Unit

[App page](https://appshunter.io/ios/app/dryfire-trigger-unit/id1291827365)

This application allows users to program a universal gun assembly for various firing modes and sensitivity settings. It connects the gun assembly to a specific system, enabling laser firing based on vibration detection.

**Highlights:** Program universal gun assembly, Select firing modes (press, release, universal), Adjust sensitivity in universal mode, Laser firing based on vibration, Link gun assembly to DryFire system

**Features:** macOS Compatibility

**In-app purchases:** none


### Zef

[App page](https://appshunter.io/ios/app/zef/id1447673572)

Track and organize your rides for various sports, including nautical activities. Features include race organization, jump height estimation, and social sharing of sessions and spots. Integrates with Health app for comprehensive data recording.

**Highlights:** Race organization and championship management, Jump height estimation using drone technology, Support for a wide range of sports, GPX file import from watches, Health app integration, Social feed for friends and spots, Live tracking and notifications

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium for one  month | $6.99 | per month |
| Summit for one year | $26.99 | per year |
| Premium for one year | $34.99 | per year |


## Frequently asked questions

### Is DryFire Trigger Unit free?

DryFire Trigger Unit is free to download, with no in-app purchases.

### Is Zef free?

Zef is free to download, with in-app purchases available.

### Which has better reviews, DryFire Trigger Unit or Zef?

Zef is rated higher. DryFire Trigger Unit averages 3.0 out of 5 from 1 ratings, while Zef averages 4.6 from 41 ratings.

### Do DryFire Trigger Unit or Zef have ads?

Neither DryFire Trigger Unit nor Zef shows ads.

### Which is updated more often, DryFire Trigger Unit or Zef?

DryFire Trigger Unit ships an update every 3 months, and Zef fortnightly. Most recently, DryFire Trigger Unit was updated on October 20, 2026 and Zef on October 22, 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.*