# Tomstrails GPS UTM vs Naviation UTM

The clearest difference is in-app purchases: Naviation UTM at none against Tomstrails GPS UTM's 1. Naviation UTM also leads on iOS requirement (16.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Tomstrails GPS UTM sells 1 one-off in-app purchase. Naviation UTM asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 26, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Tomstrails GPS UTM | Naviation UTM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.6K ratings)](https://appshunter.io/ios/app/tomstrails-gps-utm/id1004370364/reviews)** | — |
| Number of ratings | **1.6K** | — |
| Positive reviews | 83.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 36 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tomstrails.com](https://appshunter.io/developer/425642318) | [Naviation](https://appshunter.io/developer/1696072960) |

## What reviewers say

### Tomstrails GPS UTM

[App page](https://appshunter.io/ios/app/tomstrails-gps-utm/id1004370364)

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.

**Highlights:** Fast and accurate UTM grid reference, Locate position on topographic maps, Works without phone signal, Supports regional datums (e.g., ED50), Multiple coordinate formats (1m, 10m, 100m), Share coordinates with other apps, High contrast display for readability

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Feature Pack | Free | one-time |

**What reviewers like**

- 🚀 Simple and free
- 👍 Works well
- 👍 Easy to use
- 👍 Accurate and reliable
- 👍 Great for hiking and emergencies

**What reviewers complain about**

- 🐛 Doesn't do anything
- 🐛 Coordinates not always accurate
- 💰 Requires payment for some features

**Reported bugs**

- Stopped working after iOS update
- UTM grids were off initially, required setting changes

**Requested features**

- Add support for Morocco coordinate system
- Add option to average readings and hold the result
- Add option to reduce coordinate display to 6 digits for emergency use
- Bring back previous features like degrees/minutes display and ability to edit messages


### Naviation UTM

[App page](https://appshunter.io/ios/app/naviation-utm/id6740231810)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tomstrails GPS UTM free?

Tomstrails GPS UTM is free to download, with in-app purchases available.

### Is Naviation UTM free?

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

### Do Tomstrails GPS UTM or Naviation UTM have ads?

Neither Tomstrails GPS UTM nor Naviation UTM shows ads.

### Which is updated more often, Tomstrails GPS UTM or Naviation UTM?

Tomstrails GPS UTM ships an update every 6 weeks, and Naviation UTM every 6 weeks. Most recently, Tomstrails GPS UTM was updated on October 26, 2026 and Naviation UTM on September 19, 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.*