# GPS Trail Map — Add GPS to any Trail Map > Adds GPS tracking to any image-based trail map using geo-location pins. (iPhone/iPad app by Peter Kramer.) - Source: https://appshunter.io/ios/app/gps-trail-map/id1540707573 (this page in markdown: same URL + `.md`) - Developer: [Peter Kramer](https://appshunter.io/developer/348619994) - Category: Travel, Health & Fitness - Price: Free with in-app purchases - Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 17+ - Requires: iOS 12.0 · 5 MB - Languages: English - Released: 2020-12-29 - Data updated: 2026-06-01 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/gps-trail-map/id1540707573/reviews.md ## What is GPS Trail Map? Turn any Trail Map into a "GPS Trail Map" and follow your location as you move anywhere on the map. A Trail Map is converted to a GPS Trail Map by adding at least two geo-location “pins” to the map as you walk the trail. Additional pins improve the accuracy of the GPS Trail Map and correct for any artistic ‘errors’ in the Trail Map. Trail Maps used to make a new GPS Trail Map can come from three sources: the iPhone camera, the Photo App and any website image or pdf. Once made, GPS Trail Maps can be saved on a World Map and become available to all users of the app. Expect to see more and more fully functional GPS Trail Maps on the World Map and available for your use. The app requires an inexpensive Token to locate your position on a GPS Trail Map. A Token allows you to follow your location for 12 hours after it is used. The app comes with 5 free Tokens. Additional Tokens can be purchased in a package of 10 Tokens using an In App Purchase. GPS Trail Map uses a least squares fit to position, orient and stretch the map onto GPS coordinates using geo-location pins placed on the map. It then projects your current GPS location onto that map favoring nearby pins with a 1/(r+∆)^3 weighting factor for each pin. Screenshots: 1) GPS Trail Map showing your location and the pins used to position, orient and stretch the Trail Map photo 2) GPS Trail Map constructed from website pdf of Princeton University Campus map. 3) The methods of sourcing a GPS Trail Map 4) GPS Trail Maps stored on the World Map around Princeton, NJ (the home of the app developer). 5) The Trailhead photo used to construct the GPS Trail Map in #1 ## Key features - Convert any map image to a GPS trail map - Add geo-location pins for accuracy - Source maps from photos, websites, or PDFs - Save and share GPS trail maps globally - Real-time location tracking on maps - In-app purchase for extended tracking tokens ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | package of 10 12-hour Tokens | $1.99 | one-time | ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/gps-trail-map/id1540707573/reviews.md ### 5/5 — Great Tool! Love this app! *2023-06-27* Where some very popular “trail tracking” software offers some real benefits, they fail to offer the outstanding ability that GPS Trail Map puts in the palm of your hand! That is the ability to make a gps map for any trail you might choose to hike. I live in an area with many wonderful trails, none of which show up in the trail catalogs of some very popular apps. So I couldn’t be more pleased with the ability to easily make a gps map for any trail I hike! Of course, I’ll be sure to tell friends and fellow hiking enthusiasts in my area about GPS Trail Maps. And they will benefit greatly from my efforts. Because I plan to create a new trail map each time I hike a different trail. Within a couple of seasons, with any luck, I should build a fairly complete catalog for my area of Downeast Maine. I should, in all fairness, acknowledge that I did note a couple of very minor display bugs, which in no way interfered with the effectiveness of this awesome app. I reported them to the app developer, who expressed appreciation, and assured me they would be corrected with the next update. Couldn’t hope for better than that! Lastly, let me say that the cost of using this app, which is completely free for your first 5 uses, is extremely reasonable after that. Happy trails, fellow hikers! ## Frequently asked questions about GPS Trail Map ### How does GPS Trail Map work? GPS Trail Map converts any image-based map into a GPS-enabled one by allowing you to place geo-location pins. It then uses your device's GPS to show your current position on this customized map. ### Can I use GPS Trail Map offline? The app requires an internet connection to initially load maps and for GPS functionality. Once a map is loaded and pins are set, you can follow your location on it, but the accuracy might depend on GPS signal availability. ### What devices does GPS Trail Map support? GPS Trail Map is available for iPhone and iPod devices. It was last updated on September 3, 2023, with version 1.2.2. ### How do I get more tracking time on GPS Trail Map? The app comes with 5 free tracking tokens, each allowing 12 hours of location tracking. Additional tokens can be purchased via in-app purchase in packages of 10. ### What is the age rating for GPS Trail Map? GPS Trail Map has an age rating of 17+, indicating mature content may be present. This is based on the app's release date of December 29, 2020. ### Does GPS Trail Map have ads? No, GPS Trail Map does not contain advertisements. The app is free to download and use, with optional in-app purchases for additional features. ### How accurate is the GPS tracking on GPS Trail Map? The app uses a least squares fit algorithm to position, orient, and stretch the map onto GPS coordinates. Accuracy is improved by adding more pins and is weighted towards nearby pins. ### What do users like about GPS Trail Map? Users appreciate the innovative approach to turning any map into a GPS tracker. The ability to source maps from various formats and the potential for a community-driven world map of trails are highlighted as key benefits. ## Version history (last 4 releases) ### 1.2.2 — 2023-09-03 Handles Dark Mode better ### 1.2.1 — 2021-12-04 Create a Trail Map from any page of a multi-page pdf. Design improvements for iPhone 13 and iOS15. Handle CloudKit errors better. ### 1.2 — 2021-05-24 Can select a single pdf page for a trail map from a multipage pdf website ### 1.1 — 2020-12-30 No release notes. ## Apps similar to GPS Trail Map | App | Rating | Price | Category | | --- | --- | --- | --- | | [MAPS.ME: Offline Maps, GPS Nav](https://appshunter.io/ios/app/mapsme-offline-maps-gps-nav/id510623322) | 4.7 (77,426) | Free | Travel | | [National Forests Northwest](https://appshunter.io/ios/app/national-forests-northwest/id1543163121) | 4.9 (11) | Free | Travel | | [Pertouli Trails](https://appshunter.io/ios/app/pertouli-trails/id1614417417) | — | Free | Travel | | [Acadia National Park GPS Guide](https://appshunter.io/ios/app/acadia-national-park-gps-guide/id1491011481) | 4.7 (263) | Free | Travel | | [MyMountain Adventures](https://appshunter.io/ios/app/mymountain-adventures/id1667165828) | 5.0 (5) | Free | Travel | | [Downtown Denver Public Art](https://appshunter.io/ios/app/downtown-denver-public-art/id1531059951) | 5.0 (1) | Free | Travel | ## More apps by Peter Kramer - [Maze Square (Lite)](https://appshunter.io/ios/app/maze-square-lite/id348864642) - [Springs'nThingsLite](https://appshunter.io/ios/app/springsnthingslite/id375527768) - [Maze HyperCube Lite](https://appshunter.io/ios/app/maze-hypercube-lite/id378658863) - [iPlayingCards (Lite)](https://appshunter.io/ios/app/iplayingcards-lite/id393472221) - [Expense List](https://appshunter.io/ios/app/expense-list/id453919019) - [OptionPosition+](https://appshunter.io/ios/app/optionposition-plus/id466960840) All apps by Peter Kramer: https://appshunter.io/developer/348619994 --- *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.*