# Harry's LapTimer Petrolhead vs Kerbz

The clearest difference is price: Kerbz at Free against Harry's LapTimer Petrolhead's $19.99. Kerbz also leads on rating (5.0 vs 3.8) and in-app purchases (none vs 1). Harry's LapTimer Petrolhead's advantage is ratings volume (153 vs 8) and chart position (#61 vs unranked). On ads and iOS requirement there is nothing between them.

Kerbz is free to download; Harry's LapTimer Petrolhead costs $19.99 up front. Harry's LapTimer Petrolhead sells 1 one-off in-app purchase. Kerbz asks for nothing beyond the download.

Kerbz holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Harry's LapTimer Petrolhead has 153 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 77% of Harry's LapTimer Petrolhead's written reviews are positive against 100% of Kerbz's.

Harry's LapTimer Petrolhead ships an update every 2 months, Kerbz daily. The most recent releases landed on November 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Harry's LapTimer Petrolhead | Kerbz |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | [3.8 (153 ratings)](https://appshunter.io/ios/app/harrys-laptimer-petrolhead/id338257907/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/kerbz/id6504121958/reviews)** |
| Number of ratings | **153** | 8 |
| Positive reviews | 76.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#61** | — |
| Size | 78 MB | 69 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Harald Schlangmann](https://appshunter.io/developer/307688601) | [Kerbz Adventures, Inc.](https://appshunter.io/developer/1750997088) |

## What reviewers say

### Harry's LapTimer Petrolhead

[App page](https://appshunter.io/ios/app/harrys-laptimer-petrolhead/id338257907)

**Currently charting:** #61 Top Paid · Sports (US App Store)

This app is an advanced tool for car enthusiasts to record and analyze sensor data for optimizing driving performance. It offers automated lap timing, video recording with data overlays, and real-time online racing competition features.

**Highlights:** Records sensor data (GPS, OBD II), Automated lap timing with 1300+ predefined tracks, In-car video recording with data overlays, Real-time online racing and competition, Driving performance analysis and optimization, Step-by-step sensor integration

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grand Prix Upgrade | $9.99 | one-time |

**What reviewers like**

- 📊 Comprehensive data logging and telemetry analysis
- 🎥 Excellent video overlay capabilities with telemetry
- 💰 Affordable alternative to expensive professional systems
- 🛠️ Highly responsive developer with active support
- 🏁 Accurate lap timing when properly configured

**What reviewers complain about**

- 🐛 Frequent app crashes and freezes
- 🎮 Confusing and unintuitive user interface
- 📍 Unreliable GPS tracking without external devices
- 🔌 Poor Bluetooth connectivity with accessories
- 📹 Video export causes app malfunction

**Reported bugs**

- App crashes when overlaying videos
- Video playback fails in Photos app until phone reboot
- Lap data not recording at certain tracks
- GPS location not recognized at specific venues
- Timer fails to start or record laps inconsistently

**Requested features**

- Ability to pause timer between sessions
- Automatic video overlay for all laps without manual processing
- Better track variant identification in database
- Improved nearby track suggestions based on location
- Dark mode option


### Kerbz

[App page](https://appshunter.io/ios/app/kerbz/id6504121958)

Discover and book a variety of automotive experiences, from track days and rallies to car shows and meetups. Connect with fellow enthusiasts and manage your event registrations and bookings seamlessly.

**Highlights:** Discover motorsport events, Book driving experiences, Find car shows and rallies, Connect with enthusiasts, Manage event registrations, Book performance cars

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

**In-app purchases:** none


## Frequently asked questions

### Is Harry's LapTimer Petrolhead free?

Harry's LapTimer Petrolhead costs $19.99, and also offers in-app purchases.

### Is Kerbz free?

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

### Which has better reviews, Harry's LapTimer Petrolhead or Kerbz?

Kerbz is rated higher. Harry's LapTimer Petrolhead averages 3.8 out of 5 from 153 ratings, while Kerbz averages 5.0 from 8 ratings.

### Do Harry's LapTimer Petrolhead or Kerbz have ads?

Neither Harry's LapTimer Petrolhead nor Kerbz shows ads.

### Which is updated more often, Harry's LapTimer Petrolhead or Kerbz?

Harry's LapTimer Petrolhead ships an update every 2 months, and Kerbz daily. Most recently, Harry's LapTimer Petrolhead was updated on November 1, 2026 and Kerbz on October 12, 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.*