# Tomstrails GPS UTM vs Trimble Mobile Manager

The clearest difference is review sentiment: Tomstrails GPS UTM at 84% against Trimble Mobile Manager's 9%. Tomstrails GPS UTM also leads on rating (4.8 vs 1.9) and ratings volume (1.6K vs 40). Trimble Mobile Manager's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On price, update cadence and ads there is nothing between them.

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

Tomstrails GPS UTM holds the better App Store score, 4.8 against 1.9. That said, the two scores are not equally well evidenced: Tomstrails GPS UTM has 1.6K ratings behind it against 40, so its average is the more settled of the two. Written reviews point the same way: 84% of Tomstrails GPS UTM's written reviews are positive against 9% of Trimble Mobile Manager's.

Tomstrails GPS UTM ships an update every 6 weeks, Trimble Mobile Manager monthly. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Tomstrails GPS UTM | Trimble Mobile Manager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.6K ratings)](https://appshunter.io/ios/app/tomstrails-gps-utm/id1004370364/reviews)** | [1.9 (40 ratings)](https://appshunter.io/ios/app/trimble-mobile-manager/id1477956695/reviews) |
| Number of ratings | **1.6K** | 40 |
| Positive reviews | **83.8% of reviews** | 9.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 226 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tomstrails.com](https://appshunter.io/developer/425642318) | [Trimble Inc.](https://appshunter.io/developer/322561665) |

## 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


### Trimble Mobile Manager

[App page](https://appshunter.io/ios/app/trimble-mobile-manager/id1477956695)

This application acts as a bridge, allowing other software to connect with Trimble GNSS receivers. It provides detailed information on position accuracy, quality control, and real-time correction data. Users can also access satellite tracking and constellation usage details.

**Highlights:** Interfacing with Trimble GNSS receivers, Position accuracy and quality control data, Real-time corrections, Satellite tracking information, Constellation usage details

**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 Trimble Mobile Manager free?

Trimble Mobile Manager is free to download, with no in-app purchases.

### Which has better reviews, Tomstrails GPS UTM or Trimble Mobile Manager?

Tomstrails GPS UTM is rated higher. Tomstrails GPS UTM averages 4.8 out of 5 from 1.6K ratings, while Trimble Mobile Manager averages 1.9 from 40 ratings.

### Do Tomstrails GPS UTM or Trimble Mobile Manager have ads?

Neither Tomstrails GPS UTM nor Trimble Mobile Manager shows ads.

### Which is updated more often, Tomstrails GPS UTM or Trimble Mobile Manager?

Tomstrails GPS UTM ships an update every 6 weeks, and Trimble Mobile Manager monthly. Most recently, Tomstrails GPS UTM was updated on October 29, 2026 and Trimble Mobile Manager on October 21, 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.*