DryFire Trigger Unit vs Zef
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DryFire Trigger Unit
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.
- 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
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The DryFire Universal gun assembly is here. This is the iOS version of the app to program it. Select the firing mode - fire on press, fire on release or universal Select the sensitivity when operating in universal mode Universal mode fires the laser based on detecting vibrations consistent with the trigger being pressed. Use this app to link the gun assembly to the DryFire system.
Zef
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.
- 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
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Zef — Ride. Track. Connect. Zef is a multi-sport tracking app built for riders, with a strong focus on nautical sports. Track your sessions, analyze your performance, discover spots, and see your friends live — all in one app. Key Features Track your rides Record your sessions with your iPhone or Apple Watch. Zef integrates with the Health app and supports GPX imports from most watches. Advanced performance analytics Get detailed session stats including speed, distance, duration, speed polar, and health data. Sessions can be replayed to analyze each maneuver. Jump analysis Measure jump height using only your iPhone or Apple Watch. Powered by algorithms inspired by drone technology. Races & challenges Create private or public races for training or competition. Visual guidance and wind angles are displayed directly on your iPhone or Apple Watch. Spots & live activity Discover spots around you and see when riders are active. Follow spots and get notified when sessions start. Friends & live tracking Follow riders by username and get notified when friends go live. Watch their sessions live on the map and stay connected. Supported Sports Sailing, Windsurfing, Kitesurfing, Wingfoil, Kitefoil, Windfoil, SUP Foil, Surfing, Wakeboard, Kayaking, Paddling, Snowkiting, Landkiting, Cross-country skiing, Skating, Bike, Electric Bike, Parawingfoil, and more with custom tags. Apple Ecosystem • iPhone & Apple Watch support • Health app integration • Optimized for the Apple ecosystem Important Sessions must be recorded from the ground to be validated. Legal Terms of Service https://zef.watch/terms-and-conditions.html Privacy Policy https://zef.watch/privacy-and-security-policy.html
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | DryFire Trigger Unit | Zef |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) | 4.6 (41 ratings) — better |
| Positive reviews | — | 90.7% of reviews |
| Number of ratings | 1 | 41 — better |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac, Apple Watch — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 16 MB | 43 MB |
| Age rating | 12+ | 4+ |
| Developer | Wordcraft International Limited | David Kieffer |
Customer experience
DryFire Trigger Unit
Zef
In-app purchases
DryFire Trigger Unit
No in-app purchases
Zef
- Premium for one month7 Days trial$6.991 Month
- Summit for one year$26.991 Year
- Premium for one year$34.991 Year
