# GPS Race Timer vs Black Box Dyno

The clearest difference is rating: Black Box Dyno at 5.0 against GPS Race Timer's 4.5. Black Box Dyno also leads on in-app purchases (none vs 1) and ads (none vs shown). GPS Race Timer's advantage is ratings volume (2.7K vs 3) and iOS requirement (12.2 vs 14.0). On price and device support there is nothing between them.

Both are free to download. GPS Race Timer sells 1 one-off in-app purchase. Black Box Dyno asks for nothing beyond the download.

Black Box Dyno holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: GPS Race Timer has 2.7K ratings behind it against 3, so its average is the more settled of the two.

GPS Race Timer ships an update every 7 months, Black Box Dyno every 5 weeks. The most recent releases landed on September 25, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | GPS Race Timer | Black Box Dyno |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.7K ratings)](https://appshunter.io/ios/app/gps-race-timer/id1340496243/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/black-box-dyno/id6476816898/reviews)** |
| Number of ratings | **2.7K** | 3 |
| Positive reviews | 34.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 50 MB | 23 MB |
| Requires iOS | **12.2** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Hagenau](https://appshunter.io/developer/1340496242) | [Lexi Wozniak](https://appshunter.io/developer/1727863700) |

## What reviewers say

### GPS Race Timer

[App page](https://appshunter.io/ios/app/gps-race-timer/id1340496243)

Accurately measure vehicle acceleration times like 0-60 mph and 1/4 mile using your iPhone's GPS. Set up timers beforehand and let the app automatically start measurements when speed targets are met or motion is detected. Save, export, and transfer your performance data easily.

**Highlights:** Measure 0-60 mph, 60-120 mph, 1/4 mile, Automatic start detection, Save and export results, Preset and adjustable timers, No extra hardware required, Optional PRO version features

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO | $4.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Accurate speed tracking
- 💡 Customizable settings
- 📊 Saves run data

**What reviewers complain about**

- 🐛 Inconsistent 0-60 and quarter mile times
- 🐛 Fails to start/record runs
- 🐛 Inaccurate distance tracking
- 🐛 Compatibility issues with newer devices

**Reported bugs**

- Timer doesn't reset properly
- App crashes on startup
- Significant GPS/speed detection delays
- Recorded times do not match actual performance

**Requested features**

- Add 60ft and 1/8 mile times
- Automatic start/stop of timer
- Manual start option for timer
- Improved accuracy and consistency


### Black Box Dyno

[App page](https://appshunter.io/ios/app/black-box-dyno/id6476816898)

This application analyzes minibike performance when used with compatible hardware. It displays real-time speed and engine RPM, and provides detailed post-run data on gearing, horsepower, torque, and top speed. It's ideal for tuning modifications or settling friendly performance debates.

**Highlights:** Speedometer, Tachometer, Gearing analysis, Horsepower tracking, Torque measurement, Top speed recording

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GPS Race Timer free?

GPS Race Timer is free to download, with in-app purchases available.

### Is Black Box Dyno free?

Black Box Dyno is free to download, with no in-app purchases.

### Which has better reviews, GPS Race Timer or Black Box Dyno?

Black Box Dyno is rated higher. GPS Race Timer averages 4.5 out of 5 from 2.7K ratings, while Black Box Dyno averages 5.0 from 3 ratings.

### Do GPS Race Timer or Black Box Dyno have ads?

GPS Race Timer shows ads; Black Box Dyno does not.

### Which is updated more often, GPS Race Timer or Black Box Dyno?

GPS Race Timer ships an update every 7 months, and Black Box Dyno every 5 weeks. Most recently, GPS Race Timer was updated on September 25, 2026 and Black Box Dyno on September 6, 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.*