# GPS Race Timer vs KTuner FlexFuel

The clearest difference is rating: KTuner FlexFuel at 5.0 against GPS Race Timer's 4.5. KTuner FlexFuel 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 1). On price, device support and iOS requirement there is nothing between them.

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

KTuner FlexFuel 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 1, so its average is the more settled of the two.

GPS Race Timer ships an update every 7 months, KTuner FlexFuel daily. The most recent releases landed on September 20, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | GPS Race Timer | KTuner FlexFuel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.7K ratings)](https://appshunter.io/ios/app/gps-race-timer/id1340496243/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ktuner-flexfuel/id6447161311/reviews)** |
| Number of ratings | **2.7K** | 1 |
| Positive reviews | 34.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 50 MB | 41 MB |
| Requires iOS | 12.2 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Hagenau](https://appshunter.io/developer/1340496242) | [Peter Linszter](https://appshunter.io/developer/530077583) |

## 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


### KTuner FlexFuel

[App page](https://appshunter.io/ios/app/ktuner-flexfuel/id6447161311)

This utility app connects to specific hardware units via Bluetooth to display real-time ethanol content and temperature. It provides essential data for users monitoring fuel mixtures.

**Highlights:** Bluetooth BLE connectivity, Real-time ethanol content display, Real-time temperature display, Supports KTuner FlexFuel units

**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 KTuner FlexFuel free?

KTuner FlexFuel is free to download, with no in-app purchases.

### Which has better reviews, GPS Race Timer or KTuner FlexFuel?

KTuner FlexFuel is rated higher. GPS Race Timer averages 4.5 out of 5 from 2.7K ratings, while KTuner FlexFuel averages 5.0 from 1 ratings.

### Do GPS Race Timer or KTuner FlexFuel have ads?

GPS Race Timer shows ads; KTuner FlexFuel does not.

### Which is updated more often, GPS Race Timer or KTuner FlexFuel?

GPS Race Timer ships an update every 7 months, and KTuner FlexFuel daily. Most recently, GPS Race Timer was updated on September 20, 2026 and KTuner FlexFuel on August 19, 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.*