# Harry's LapTimer Grand Prix vs Simple Interval Timer

The clearest difference is price: Simple Interval Timer at Free against Harry's LapTimer Grand Prix's $27.99. Simple Interval Timer also leads on rating (4.9 vs 4.0) and review sentiment (85% vs 58%). Harry's LapTimer Grand Prix's advantage is in-app purchases (none vs 4) and ads (none vs shown). On monetization model and device support there is nothing between them.

Simple Interval Timer is free to download; Harry's LapTimer Grand Prix costs $27.99 up front. Simple Interval Timer sells 4 one-off in-app purchases. Harry's LapTimer Grand Prix asks for nothing beyond the download.

Simple Interval Timer holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Simple Interval Timer has 5.4K ratings behind it against 80, so its average is the more settled of the two. Written reviews point the same way: 58% of Harry's LapTimer Grand Prix's written reviews are positive against 85% of Simple Interval Timer's.

Harry's LapTimer Grand Prix ships an update every 2 months, Simple Interval Timer every 8 months. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Harry's LapTimer Grand Prix | Simple Interval Timer |
| --- | --- | --- |
| Price | $27.99 | **Free** |
| Rating | [4.0 (80 ratings)](https://appshunter.io/ios/app/harrys-laptimer-grand-prix/id363556704/reviews) | **[4.9 (5.4K ratings)](https://appshunter.io/ios/app/simple-interval-timer/id458334253/reviews)** |
| Number of ratings | 80 | **5.4K** |
| Positive reviews | 58.2% of reviews | **84.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | **#87** | — |
| Size | 81 MB | 10 MB |
| Requires iOS | **12.0** | 14.5 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Harald Schlangmann](https://appshunter.io/developer/307688601) | [0FF](https://appshunter.io/developer/455256988) |

## What reviewers say

### Harry's LapTimer Grand Prix

[App page](https://appshunter.io/ios/app/harrys-laptimer-grand-prix/id363556704)

**Currently charting:** #87 Top Paid · Sports (US App Store)

This app records and analyzes sensor data from your device to help you optimize driving performance. It offers automated lap timing, video recording with data overlays, and real-time online racing features. Track your progress on over 1300 predefined tracks or everyday routes.

**Highlights:** Sensor data recording, Automated lap timing, In-car video recording with data overlay, Real-time online racing and competition, Track and everyday route analysis, External sensor integration (GPS, OBD II)

**Features:** Apple Watch app

**In-app purchases:** none


### Simple Interval Timer

[App page](https://appshunter.io/ios/app/simple-interval-timer/id458334253)

This app provides a straightforward interval timer for various training types like running, cycling, and HIIT. Customize sets, action, and break durations for a personalized workout experience. It runs in the background and saves recent configurations.

**Highlights:** Customizable sets, action, and break durations, Plain and simple design, Saves last 5 configurations, Runs in the background, iOS screen dimming prevention, Apple Watch integration with heart rate monitoring

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Espresso | $0.99 | one-time |
| Americano | $1.99 | one-time |
| Ad-free version | $2.99 | one-time |
| Caramel Cappuccino | $2.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Efficient and straightforward
- 💰 Actually free, no paywall
- 🔊 Unobtrusive audio cues
- 🎶 Works well with music playback

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- ⚙️ Limited customization options
- 🔋 Compatibility issues with newer iOS versions
- 🔍 Difficulty deleting/managing saved configurations

**Reported bugs**

- Timer stops working when screen is locked
- Countdown beeps not syncing with timer
- Interval times not accurately tracked

**Requested features**

- Ability to name and delete saved configurations
- More granular interval time settings (e.g., 1-second increments)
- Stronger haptic feedback on Apple Watch
- Integration with workout tracking apps


## Frequently asked questions

### Is Harry's LapTimer Grand Prix free?

Harry's LapTimer Grand Prix costs $27.99, with no in-app purchases.

### Is Simple Interval Timer free?

Simple Interval Timer is free to download, with in-app purchases available.

### Which has better reviews, Harry's LapTimer Grand Prix or Simple Interval Timer?

Simple Interval Timer is rated higher. Harry's LapTimer Grand Prix averages 4.0 out of 5 from 80 ratings, while Simple Interval Timer averages 4.9 from 5.4K ratings.

### Do Harry's LapTimer Grand Prix or Simple Interval Timer have ads?

Simple Interval Timer shows ads; Harry's LapTimer Grand Prix does not.

### Which is updated more often, Harry's LapTimer Grand Prix or Simple Interval Timer?

Harry's LapTimer Grand Prix ships an update every 2 months, and Simple Interval Timer every 8 months. Most recently, Harry's LapTimer Grand Prix was updated on September 26, 2026 and Simple Interval Timer on September 25, 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.*