# RallyOdoTimer > GPS rally odometer with dual counters and interval timers. (iPhone/iPad app by Clarence Westberg.) - Source: https://appshunter.io/ios/app/rallyodotimer/id925468288 (this page in markdown: same URL + `.md`) - Developer: [Clarence Westberg](https://appshunter.io/developer/733915609) - Category: Sports, Navigation - Price: Free - Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 8.3 · 5 MB - Languages: American English - Released: 2014-10-15 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/rallyodotimer/id925468288/reviews.md ## What is RallyOdoTimer? A GPS based rally odometer with Halda Twinmaster-like functions. Upper counter is for main mileage. Lower counter is for auxiliary and interval mileage. Start button starts GPS monitoring. When started the text is green. Stop button stops GPS monitoring. Upper Counter mileage can be changed by 1, .1 and .01 buttons. Z-Aux sets the trip meter to zero. Split OM displays mileage when button was pressed and also resets trip. Factor field when pressed brings up a numeric entry field to edit the factor. Set Factor sets the factor to the value in the factor field and closes numeric entry. Chevrons set direction of mileage GPS Accuracy displays a count of how many GPS readings since last zero or start. Also displays the horizontal accuracy of the new and old GPS readings. The reverse buttons and stop buttons are activated by swiping rather than pushing in order to prevent inadvertent actions. Mileage is updated about once a second. Two interval timers. Functions can be set in settings KM/Miles Each timer/clock can be set to run in seconds or cents. Z-Aux zeros lower counter GPS/0 starts GPS and zeros both counters. Each timer/clock can be set to read in seconds or cents. Timer functions Timers are self resetting interval timers. Clear set;s them both to 0.00 and stops them. T1 wait delays the start of timer 1 until the top of the minute. Stop and start stops current timer and starts other timer at 0.00 Pause and start stops timer 1 and stars timer2. Pressing pause again starts timer 1 where it left off.Useful for pauses. Continued use of GPS running in the background can dramatically decrease battery life. If you plan to use for extended periods of time run with the charger connected. ## Key features - Dual mileage counters (main and auxiliary) - Adjustable mileage increments - Interval timers with customizable settings - GPS monitoring with accuracy display - Swipe controls for reverse and stop buttons - KM/Miles unit selection ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/rallyodotimer/id925468288/reviews.md ### 5/5 — Mph to kph *2016-02-01* Great product. Only trouble I can't change the speedometer to read in kph. It has defaulted to mph and I have no way to change it. Odometer reads in klm. Also set factor does not bring up keyboard to change setting. Running latest Apple OS 9.2.1 ## Frequently asked questions about RallyOdoTimer ### What is RallyOdoTimer used for? RallyOdoTimer is a GPS-based rally odometer that functions similarly to a Halda Twinmaster. It allows users to track main mileage, auxiliary mileage, and utilize interval timers for rally events. ### Can RallyOdoTimer be used offline? The description does not specify offline functionality. However, its core feature relies on GPS monitoring, which typically requires a cellular or Wi-Fi connection for accurate positioning. ### How does RallyOdoTimer handle mileage adjustments? The upper counter's mileage can be adjusted by 1, 0.1, and 0.01 increments. The 'Z-Aux' button zeros the lower trip meter, and 'Split OM' displays and resets the trip meter. ### What are the timer functions in RallyOdoTimer? RallyOdoTimer includes two interval timers that are self-resetting. They can be set to run in seconds or cents, with options for delayed starts, pausing, and switching between timers. ### Does RallyOdoTimer have ads? No, RallyOdoTimer does not contain advertisements. It is a completely free application without any ad interruptions. ### What devices is RallyOdoTimer compatible with? RallyOdoTimer is supported on iPhone and iPod devices. It has an age rating of 4+. ### How often is RallyOdoTimer updated? The latest version is 1.1.1, released on November 13, 2015. The app was initially released on October 15, 2014, indicating infrequent updates in recent years. ### What is the user sentiment for RallyOdoTimer? Based on the available data, RallyOdoTimer has a perfect rating of 5.0 stars from 2 ratings, suggesting a very positive reception from its limited user base. ## Version history (last 2 releases) ### 1.1.1 — 2015-11-13 This app has been updated by Apple to display the Apple Watch app icon. Updated to fix erroneous mileage bugs app had in iOS 9. Fixed labeling issue in iPhone 6. ### 1.0 — 2014-10-15 No release notes. ## Apps similar to RallyOdoTimer | App | Rating | Price | Category | | --- | --- | --- | --- | | [Competitor](https://appshunter.io/ios/app/competitor/id1448298019) | 2.8 (8) | Free | Sports | | [Speedpilot](https://appshunter.io/ios/app/speedpilot/id1028835340) | — | Free | Sports | | [Rally Tripmeter](https://appshunter.io/ios/app/rally-tripmeter/id1063654075) | 4.7 (89) | Free | Sports | | [Rally Watch](https://appshunter.io/ios/app/rally-watch/id1672001174) | — | Free | Sports | | [Richta Simple Rally Odometer](https://appshunter.io/ios/app/richta-simple-rally-odometer/id1659118495) | 5.0 (1) | $9.99 | Sports | | [Richta GPS - Scoreboard](https://appshunter.io/ios/app/richta-gps-scoreboard/id1577035785) | — | Free | Sports | ## More apps by Clarence Westberg - [RallyOdoSwift](https://appshunter.io/ios/app/rallyodoswift/id1069069955) All apps by Clarence Westberg: https://appshunter.io/developer/733915609 --- *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 2026-06-01.*