# Digital Link vs Speed Tracker mach4

The clearest difference is rating: Speed Tracker mach4 at 3.7 against Digital Link's 3.0. Speed Tracker mach4 also leads on device support (4 vs 2) and iOS requirement (9 vs 16.4). Digital Link's advantage is ratings volume (50 vs 3). On price, review sentiment, update cadence and ads there is nothing between them.

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

Speed Tracker mach4 holds the better App Store score, 3.7 against 3.0. That said, the two scores are not equally well evidenced: Digital Link has 50 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 43% of Digital Link's written reviews are positive against 50% of Speed Tracker mach4's.

Digital Link ships an update every 5 weeks, Speed Tracker mach4 every 6 weeks. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Digital Link | Speed Tracker mach4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (50 ratings)](https://appshunter.io/ios/app/digital-link/id936249854/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/speed-tracker-mach4/id6446348164/reviews)** |
| Number of ratings | **50** | 3 |
| Positive reviews | 43.1% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 71 MB | 78 MB |
| Requires iOS | 16.4 | **9** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Competition Electronics](https://appshunter.io/developer/936249853) | [nVisti](https://appshunter.io/developer/1058574940) |

## What reviewers say

### Digital Link

[App page](https://appshunter.io/ios/app/digital-link/id936249854)

Control your chronograph and manage velocity data wirelessly from your smartphone or tablet. Ideal for testing shooting loads and skills for speed and consistency.

**Highlights:** Wireless chronograph control, Velocity data collection, Modern user interface, Smartphone/tablet connectivity, Load testing, Shooting skill analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Speed Tracker mach4

[App page](https://appshunter.io/ios/app/speed-tracker-mach4/id6446348164)

Measure the speed of objects using Doppler radar technology. This app accurately tracks speeds from 250 to 1250 m/s with precision better than 0.1%. Available on various Apple devices.

**Highlights:** Doppler radar speed measurement, Speed range: 250-1250 m/s, Accuracy better than 0.1%, Supports Apple Watch, iPhone, iPad, iPod

**In-app purchases:** none


## Frequently asked questions

### Is Digital Link free?

Digital Link is free to download, with no in-app purchases.

### Is Speed Tracker mach4 free?

Speed Tracker mach4 is free to download, with no in-app purchases.

### Which has better reviews, Digital Link or Speed Tracker mach4?

Speed Tracker mach4 is rated higher. Digital Link averages 3.0 out of 5 from 50 ratings, while Speed Tracker mach4 averages 3.7 from 3 ratings.

### Do Digital Link or Speed Tracker mach4 have ads?

Neither Digital Link nor Speed Tracker mach4 shows ads.

### Which is updated more often, Digital Link or Speed Tracker mach4?

Digital Link ships an update every 5 weeks, and Speed Tracker mach4 every 6 weeks. Most recently, Digital Link was updated on October 7, 2026 and Speed Tracker mach4 on October 1, 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.*