# Harry's LapTimer To Go

> Advanced lap timer and driving performance analysis app for track days and route optimization. (iPhone/iPad app by Harald Schlangmann.)

- Source: https://appshunter.io/ios/app/harrys-laptimer-to-go/id1037706464 (this page in markdown: same URL + `.md`)
- Developer: [Harald Schlangmann](https://appshunter.io/developer/307688601)
- Category: Sports, Navigation
- Price: Free
- Rating: 3.78/5 from 9 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 80 MB
- Languages: German (Germany), Italian, Japanese, French (France), Chinese (Simplified, China), Chinese (Traditional, Taiwan), American English, European Spanish
- Released: 2015-10-31
- Data updated: 2026-08-22
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/harrys-laptimer-to-go/id1037706464/reviews.md

## What is Harry's LapTimer To Go?

Harry’s LapTimer是赛道驾车的“终极应用”。LapTimer可以通过iPhone及各种外置数据源，获得传感器数据，以展示您的驾车风格，获得从未体实现的赛车体验！

LapTimer内置了全世界各地超过1300条专业赛道。通过其内置的助手，可以简单上手：选择您所需的赛道，就可以马上开始赛车！LapTimer还可以自动计时，并把结果展示为各种图表，视频，导出成各种格式的文件。

当然，LapTimer不仅仅可以使用在专业赛道上。您也可以，例如：把从家到工作单位的路程定义为’赛道’，收集不同路线的统计数据，并优化路线以减少路程所需的时间。

想展示您的驾驶数据？LapTimer可以生成完美车内视频，包含：完整的数据贴图，您也可以直接上传视频至网络——例如：Youtube。除了视频，您也可以通过各种特定功能，一步一步提高您的赛车成绩。

LapTimer也可以’在线竞赛’——不管是生死决斗或是轻松体验。LapTimer为每条赛道都提供了’最佳名单’。您可以’即时’在线观看您朋友的赛道驾驶，也可以互相对比赛道中的各个分段计时，刹车点，加速点——您可以与您的朋友互相学习进步！

LapTimer只需一部iPhone就可以使用。当然您也可以根据您的需求，添加外置的GPS设备（例如：5 Hz频率）或OBD II传感器，以获得更多更加精确的数据。

LapTimer包括3个版本：LapTimer Rookie（新手版）是包括计时与数据录制功能的入门版本。LapTimer Petrolhead（车迷版）是包括一系列视频功能的进阶版本。LapTimer GrandPrix（车手版）是包括同时控制多个相机，高级分析功能和专业传感器支持（小于20 Hz）的专业版本。

在一部分地区，您可以免费下载LapTimer ToGo版本。它的功能与LapTimer Petrolhead（车迷版）相似。与其它三个版本不同的是，在ToGo版本中，您可以通过内购，解锁一整天的高级版本功能。这对于一年中只花几天时间在赛道上的您非常适合！

LapTimer的功能取决于您当前的iPhone和iOS的版本。某些功能可能需要添加外置传感器（例如：OBD II）才可以使用。请登录我们的主页以获得更多的细节。当然，您也可以选择内购，以升级到更高版本的LapTimer。

市场上已存在许多圈速计时的App。相比Harry’s LapTimer，它们大多数相当昂贵，却只有很少的功能。如果您是真正的车手，选择Harry’s LapTimer！在专业领域中，还没有任何圈速计时工具可以提供如此多的功能。我们的目标是通过持续的开发及更新以保持我们在这一领域中的领先地位！

请访问 http://www.gps-laptimer.de，以获得更多的信息与支持。请访问我们的论坛 http://www.gps-laptimer-forum.de，以参与LapTimer的开发工作以及获得更好的支持。

## Key features

- Lap timing and data recording
- Performance analysis with charts and graphs
- In-car video recording with data overlays
- Online competition and leaderboards
- Route optimization for daily commutes
- Support for external GPS and OBD II sensors

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/harrys-laptimer-to-go/id1037706464/reviews.md

### 3/5 — Dji Action2 should be support!

*2021-12-15*

Plz support Dji Action 2, it’s a very nice cam.

### 1/5 — obd突然被禁用？

*2021-11-09*

今天打开发现很多obd都被禁用了？啥原因啊？

### 5/5 — 不知道怎么样弄出赛道全貌

*2019-12-01*

花钱用了一天的专业版，感觉不错

## Frequently asked questions about Harry's LapTimer To Go

### What is Harry's LapTimer To Go?

Harry's LapTimer To Go is a free version of the app that offers similar features to the Petrolhead edition. It allows you to unlock premium features for a day through in-app purchases, making it ideal for occasional track users.

### Does Harry's LapTimer To Go have ads?

No, Harry's LapTimer To Go does not contain advertisements. The app is free to download and offers optional in-app purchases to unlock advanced features.

### What devices is Harry's LapTimer To Go compatible with?

Harry's LapTimer To Go is compatible with iPhone, iPad, and iPod. It also supports Apple Watch for on-the-go data access.

### How accurate is the timing in Harry's LapTimer To Go?

The app's accuracy depends on your device's sensors. For enhanced precision, you can connect external GPS devices with higher frequencies (e.g., 5 Hz) or OBD II sensors.

### Can I use Harry's LapTimer To Go offline?

Yes, the core lap timing and data recording features of Harry's LapTimer To Go can be used offline. However, online competition and video uploading features require an internet connection.

### What are the different versions of Harry's LapTimer?

Harry's LapTimer comes in three main versions: Rookie (basic timing and data), Petrolhead (video features), and GrandPrix (advanced features and professional sensor support). The To Go version offers a free entry point with daily premium unlocks.

### How often is Harry's LapTimer updated?

The app was last updated on June 25, 2026, indicating a commitment to ongoing development and improvements. Users can expect regular updates to maintain its leading position in the market.

### What is the age rating for Harry's LapTimer To Go?

Harry's LapTimer To Go has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals interested in automotive applications.

## Version history (last 5 releases)

### 25.1.0 — 2026-06-25

User Interface
- fixed dragging POIs in Map
- added option to scroll buttons in case available buttons do not fit screen width
- fixed misplaced sector indicator in Timer View

CarPlay
- fixed crash when app is started from CarPlay
- fixed negative height display in CarPlay

Sensor support
- added support for Haze GNSS sensors
- added OBD support for Hybrid battery SoC plus tank gadget allowing to toggle between tank and battery level
- added heading support for NMEA sensors w/o RMC (like Columbus)
- fixed a scripting error in RaceboxMini sensor implementation
- made hundreds seconds handling for Racebox Mini more robust
- fixed a bug in CSV headers

### 25.0.1 — 2025-05-14

- redesigned CarPlay startup
- fixed a bug crashing LapTimer when started with CarPlay connected
- some minor interface changes and fixes
- switched to Inches for very precise accuracy displays

### 25.0.0 — 2025-05-06

- new: support for Apple CarPlay added
- reimplemented support for RaceBox Mini, Mini S and added RaceBox Micro
- added support for RTK GNSS sensors
- added support for Columbus P-70 Ultra sensor
- change accuracy precision to centimeters / inches
- added support for NetRTK / NTRIP casters
- completely new and full localizations for Japanese, Chinese (traditional, simplified), Spanisch, French, Italian
- made NMEA parser more resilient to changing sentence pattern
- updated list of iPad/iPhone models (M4 iPad, iPhone 16)
- fixed a bug in day / night weather icons
- fixed a problem that positioned forward / backward buttons wrongly in Lap Details
- fixed order of parameters in Sensor Configuration dialogs 
- improved BTLE write operations
- improved NMEA sentence displays
- dozens of minor fixes, improvements, features

### 24.9.1 — 2024-06-30

- reworked routines checking available storage
- use expert setting "Low Memory" to remove all storage checkings

### 24.9.0 — 2024-05-05

- fixed a bug in gear calculation
- replaced deprecated acceleration framework
- added support for Vgate vLinker FD+/MC+/BM+ OBD adapters
- fixed and improved VBO import
- rechecked Racebox integration to deliver high update rates

## More apps by Harald Schlangmann

- [Harry's LapTimer Rookie](https://appshunter.io/ios/app/harrys-laptimer-rookie/id307688598)
- [Harry's Sailor](https://appshunter.io/ios/app/harrys-sailor/id319244049)
- [Harry's GPS/OBD Buddy](https://appshunter.io/ios/app/harrys-gpsobd-buddy/id320423931)
- [Harry's LapTimer Petrolhead](https://appshunter.io/ios/app/harrys-laptimer-petrolhead/id338257907)
- [Harry's LapTimer Grand Prix](https://appshunter.io/ios/app/harrys-laptimer-grand-prix/id363556704)
- [Harry's Camper](https://appshunter.io/ios/app/harrys-camper/id952167017)

All apps by Harald Schlangmann: https://appshunter.io/developer/307688601

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*