This app provides precise UTM grid references and displays your location on topographic maps. It works offline, supports various regional datums, and offers multiple coordinate formats for easy sharing and use in other applications.
Reviews of Tomstrails GPS UTM are mostly positive: the Navigation app is rated 4.8/5 from 1.6K App Store ratings. What users like most: simple and free, works well. Top complaints: doesn't do anything, coordinates not always accurate. Summarized from real user reviews.
2.1.2
October 10, 2026
iPhone Duo support.
Free
Feature Pack
Removed from the App Store on November 1, 2026. Adds a magnetic compass and share options
2 issues
Stopped working after iOS update
UTM grids were off initially, required setting changes
4 requests
Add support for Morocco coordinate system
Add option to average readings and hold the result
Tomstrails GPS UTM provides fast and accurate UTM grid references and displays your current location on topographic maps. It is designed to work even in areas with no phone signal, making it ideal for remote use.
Key features include offline functionality, support for various regional datums like ED50, multiple coordinate formats (1m, 10m, 100m), the ability to paste or share coordinates, a high-contrast display for readability, and optimized battery usage.
The app is free to download and use, with additional features or content potentially available through in-app purchases. It does not display any advertisements.
No, a significant advantage of this app is that it does not require a phone signal to function. It works in the most remote locations by utilizing GPS.
This app is beneficial for hikers, campers, surveyors, geocachers, and anyone who needs to know their precise location, especially in areas without cellular service. Its offline capabilities and accurate grid references are valuable for outdoor activities and professional use.
