# RallyMeter Calibrator

> RallyMeter Calibrator (iPhone/iPad app by Peter Lawrence.)

- Source: https://appshunter.io/ios/app/rallymeter-calibrator/id1528343167 (this page in markdown: same URL + `.md`)
- Developer: [Peter Lawrence](https://appshunter.io/developer/1521268759)
- Category: Sports, Utilities
- Price: $0.99
- Age rating: 4+
- Requires: iOS 11.0 · 8 MB
- Languages: American English
- Released: 2020-08-21
- Data updated: 2026-07-18
- User reviews in markdown: https://appshunter.io/ios/app/rallymeter-calibrator/id1528343167/reviews.md

## What is RallyMeter Calibrator?

When participating in any form of classic car event, a key piece of information is distance travelled, which is then also used to calculate your speed in speed controlled events. To ensure the distance shown on your rally meter corresponds to the distance measured by the event organisers, you must first calibrate your rally meter.

The RallyMeter Calibrator allows you to enter the official measured mile distance, your measured mile recorded value, and current calibration value (where applicable), and gives you the correct calibration setting or adjustment for the event and your vehicle.

The app supports most popular brands of rally meter including:
Halda Tripmaster
Halda Twinmaster
Halda Speedpilot
Brantz International
Brantz Retrotrip
Brantzmaster
Monit
Terratrip

For Halda Tripmaster and Twinmaster users, you can select the X and Z gears you have available, and the app will give you the selection of gears that provide the closest calibration setting.


## Version history (last 4 releases)

### 1.2.0 — 2023-04-10

NEW: - For Halda Tripmaster and Twinmaster users, tap the recommended Z-Gear value to lock the Z-Gear to your current value and give you the nearest X-Gear to match the required calibration setting.

### 1.1.0 — 2021-10-24

Updated for iOS15
If 2 different Halda gear pairs give the same Available Calibration Factor, and one of those gear pairs includes a currently selected gear, that gear pair will now be shown in preference.
Current gear pair selection is now maintained if other gears' availability is changed.

### 1.0.1 — 2020-09-16

Improved error handling for Halda gear selection
Improved release of Location Services

### 1.0 — 2020-08-20

No release notes.

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## More apps by Peter Lawrence

- [12 Car Rally Timer](https://appshunter.io/ios/app/12-car-rally-timer/id1521268757)
- [RallyTimer Marshal](https://appshunter.io/ios/app/rallytimer-marshal/id1556261948)
- [RallyTimer Results](https://appshunter.io/ios/app/rallytimer-results/id1558703702)

All apps by Peter Lawrence: https://appshunter.io/developer/1521268759

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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 2026-07-18.*