# Tomstrails GPS Duo vs UTM Geo Map

Tomstrails GPS Duo and UTM Geo Map both sit at 4.6 stars, but that hides the real split: 100% of UTM Geo Map's written reviews are positive against 91% of Tomstrails GPS Duo's. Tomstrails GPS Duo's advantage is iOS requirement (11.0 vs 16). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.6 for Tomstrails GPS Duo against 4.8 for UTM Geo Map. Both are backed by a comparable volume of ratings — 149 and 111 respectively. Written reviews are what separate them: 91% of Tomstrails GPS Duo's written reviews are positive against 100% of UTM Geo Map's.

Tomstrails GPS Duo ships an update monthly, UTM Geo Map every 2 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Tomstrails GPS Duo | UTM Geo Map |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (149 ratings)](https://appshunter.io/ios/app/tomstrails-gps-duo/id425642315/reviews) | **[4.8 (111 ratings)](https://appshunter.io/ios/app/utm-geo-map/id6744716161/reviews)** |
| Number of ratings | **149** | 111 |
| Positive reviews | 90.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | Free |
| Size | 10 MB | 42 MB |
| Requires iOS | **11.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tomstrails.com](https://appshunter.io/developer/425642318) | [4Digsoft](https://appshunter.io/developer/1799889257) |

## What reviewers say

### Tomstrails GPS Duo

[App page](https://appshunter.io/ios/app/tomstrails-gps-duo/id425642315)

This app displays your location using various global coordinate systems, including British, Irish, MGRS, and UTM grids, as well as latitude and longitude. It features an optimized battery life for extended use and a high-contrast display for readability in all conditions.

**Highlights:** Multiple grid formats (British, Irish, MGRS, UTM), Latitude & Longitude display, Optimized battery life, High-contrast display, Simultaneous grid format display

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and intuitive user interface
- 🎯 Accurate GPS coordinates and location tracking
- ⚡ Fast performance and quick GPS fixes
- 🔋 Low battery consumption
- 📍 Multiple coordinate system support (Lat/Long, UTM, MGRS, OS Grid)

**What reviewers complain about**

- 🧭 Azimuth/compass readings reported as ~30 degrees off
- 📍 Limited coordinate system options (missing NAD83)
- 🔄 Recent UI changes made coordinate systems less accessible
- ⌚ Apple Watch functionality limited or unavailable
- 🌙 No dark mode or night navigation support

**Reported bugs**

- App crashes on launch in certain locations
- iPad GPS not recognized despite device capability
- Azimuth readings approximately 30 degrees inaccurate
- Google Maps linking feature broken in recent updates
- Inconsistent performance with older iOS versions

**Requested features**

- Apple Watch full compatibility
- Dark mode or inverted colors for night navigation
- Portrait orientation mode
- 10-figure grid references instead of 8-figure
- NAD83 coordinate system support


### UTM Geo Map

[App page](https://appshunter.io/ios/app/utm-geo-map/id6744716161)

This app allows users to work with various coordinate systems including Latitude/Longitude, UTM, and MGRS. Save points with automatic address information, view them on a map, and navigate using GPS. Manage all saved points in a data list with new icon customization.

**Highlights:** Supports Latitude/Longitude, UTM, MGRS, DMS, Geohash, Plus Codes, Save points with automatic address info, Navigate using device GPS, Manage saved points in a data list, Add custom icons for saved points

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Tomstrails GPS Duo free?

Tomstrails GPS Duo is free to download, with no in-app purchases.

### Is UTM Geo Map free?

UTM Geo Map is free to download, with no in-app purchases.

### Which has better reviews, Tomstrails GPS Duo or UTM Geo Map?

UTM Geo Map is rated higher. Tomstrails GPS Duo averages 4.6 out of 5 from 149 ratings, while UTM Geo Map averages 4.8 from 111 ratings.

### Do Tomstrails GPS Duo or UTM Geo Map have ads?

Neither Tomstrails GPS Duo nor UTM Geo Map shows ads.

### Which is updated more often, Tomstrails GPS Duo or UTM Geo Map?

Tomstrails GPS Duo ships an update monthly, and UTM Geo Map every 2 months. Most recently, Tomstrails GPS Duo was updated on November 1, 2026 and UTM Geo Map on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*