GPS OS Grid Reference
GPS OS Grid Reference Summary
GPS OS Grid Reference is a with in-app purchases iOS app in Maps And Navigation by Tomstrails.com. Released in May 2015 (10 years ago). It has 20 ratings with a 4.10★ (good) average. Based on AppGoblin estimates, it reaches roughly 83 monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Nov 19, 2025, version 251118.
Data tracking: SDKs and third-party integrations were last analyzed on Feb 27, 2026.
Store info: Last updated on App Store on Nov 19, 2025 (version 251118).
4.1★
Ratings: 20
Screenshots
App Description
GPS OS provides a fast and accurate way to locate your position on an Ordnance Survey map, both in Great Britain and Ireland.
• No phone signal required - works in the most remote locations.
• OSTN15 transform data for high conversion accuracy (better than 1m).
• 6, 8 and 10 figure grid references.
• A large, clear, high contrast display ensures you can easily read your position in any light conditions.
• Optimises the frequency of position updates depending on battery charge and speed of travel to make sure you can always make calls at the end of the day.
• Create waypoints from a map, your current location or manually enter Ordnance Survey coordinates.
• Explore waypoints and get directions in Apple Maps.
• Share waypoints with other apps or users.
• No adverts.
Includes OSTN15 transform data licensed with permission.
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