# GPS Race Timer vs TDI Flasher

The clearest difference is rating: GPS Race Timer at 4.5 against TDI Flasher's 3.0. GPS Race Timer also leads on ratings volume (2.7K vs 2) and iOS requirement (12.2 vs 15.1). TDI Flasher's advantage is in-app purchases (none vs 1) and update cadence (every 3 months vs every 7 months). On price, ads and device support there is nothing between them.

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

GPS Race Timer holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: GPS Race Timer has 2.7K ratings behind it against 2, so its average is the more settled of the two.

GPS Race Timer ships an update every 7 months, TDI Flasher every 3 months. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | GPS Race Timer | TDI Flasher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2.7K ratings)](https://appshunter.io/ios/app/gps-race-timer/id1340496243/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/tdi-flasher/id6447965520/reviews) |
| Number of ratings | **2.7K** | 2 |
| Positive reviews | 34.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 50 MB | 55 MB |
| Requires iOS | **12.2** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Thomas Hagenau](https://appshunter.io/developer/1340496242) | [Mobile Flash Solutions Ltd](https://appshunter.io/developer/1683126213) |

## 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


### TDI Flasher

[App page](https://appshunter.io/ios/app/tdi-flasher/id6447965520)

Remap your VAG TDI vehicle from home with this mobile tuning solution. Improve power and efficiency by flashing custom tunes. Requires a specific OBD adapter.

**Highlights:** Datalogging with BHP & Torque estimates, Read & Clear Trouble Codes, Remap/Flash vehicle with performance tunes, Check OBD Readiness Status

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

**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 TDI Flasher free?

TDI Flasher is free to download, with no in-app purchases.

### Which has better reviews, GPS Race Timer or TDI Flasher?

GPS Race Timer is rated higher. GPS Race Timer averages 4.5 out of 5 from 2.7K ratings, while TDI Flasher averages 3.0 from 2 ratings.

### Do GPS Race Timer or TDI Flasher have ads?

Both GPS Race Timer and TDI Flasher show ads.

### Which is updated more often, GPS Race Timer or TDI Flasher?

GPS Race Timer ships an update every 7 months, and TDI Flasher every 3 months. Most recently, GPS Race Timer was updated on September 25, 2026 and TDI Flasher on September 8, 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.*