# GPS Race Timer vs Density Converter

The clearest difference is price: GPS Race Timer at Free against Density Converter's $1.99. GPS Race Timer also leads on update cadence (every 7 months vs every 38 months). Density Converter's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

GPS Race Timer is free to download; Density Converter costs $1.99 up front. GPS Race Timer sells 1 one-off in-app purchase. Density Converter asks for nothing beyond the download.

GPS Race Timer ships an update every 7 months, Density Converter every 38 months. The most recent releases landed on October 17, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | GPS Race Timer | Density Converter |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.5 (2.7K ratings)](https://appshunter.io/ios/app/gps-race-timer/id1340496243/reviews)** | — |
| Number of ratings | **2.7K** | — |
| Positive reviews | 34.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 7 months** | Every 38 months |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 0 MB |
| Requires iOS | **12.2** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Hagenau](https://appshunter.io/developer/1340496242) | [Anna Filobok](https://appshunter.io/developer/1613515832) |

## 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


### Density Converter

[App page](https://appshunter.io/ios/app/density-converter/id1539270045)

**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 Density Converter free?

Density Converter costs $1.99, with no in-app purchases.

### Do GPS Race Timer or Density Converter have ads?

GPS Race Timer shows ads; Density Converter does not.

### Which is updated more often, GPS Race Timer or Density Converter?

GPS Race Timer ships an update every 7 months, and Density Converter every 38 months. Most recently, GPS Race Timer was updated on October 17, 2026 and Density Converter on October 4, 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.*