# Tomstrails GPS UTM vs GPS Test Satellite Tracker

The clearest difference is rating: Tomstrails GPS UTM at 4.8 against GPS Test Satellite Tracker's 3.5. Tomstrails GPS UTM also leads on review sentiment (84% vs 50%) and ratings volume (1.6K vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Tomstrails GPS UTM sells 1 one-off in-app purchase and GPS Test Satellite Tracker sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Tomstrails GPS UTM holds the better App Store score, 4.8 against 3.5. That said, the two scores are not equally well evidenced: Tomstrails GPS UTM has 1.6K ratings behind it against 2, 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 50% of GPS Test Satellite Tracker's.

Tomstrails GPS UTM ships an update every 6 weeks, GPS Test Satellite Tracker every 3 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | Tomstrails GPS UTM | GPS Test Satellite Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.6K ratings)](https://appshunter.io/ios/app/tomstrails-gps-utm/id1004370364/reviews)** | [3.5 (2 ratings)](https://appshunter.io/ios/app/gps-test-satellite-tracker/id6791295491/reviews) |
| Number of ratings | **1.6K** | 2 |
| Positive reviews | **83.8% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 7 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Tomstrails.com](https://appshunter.io/developer/425642318) | [Tigran Barseghyan](https://appshunter.io/developer/1367662357) |

## 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


### GPS Test Satellite Tracker

[App page](https://appshunter.io/ios/app/gps-test-satellite-tracker/id6791295491)

Track satellites like Starlink and the ISS in real-time with a live radar. View your device's GPS/GNSS status, including satellite visibility and signal strength. Explore detailed orbital data for various celestial objects.

**Highlights:** Live satellite radar for Starlink, ISS, and orbital objects, Real GPS/GNSS fix quality and accuracy, GNSS satellites overhead: in use vs. in view, Full orbit track and telemetry for any satellite, Signal indicators and NORAD IDs

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $8.99 | per month |
| Pro Annual | $39.99 | per year |
| Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Tomstrails GPS UTM free?

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

### Is GPS Test Satellite Tracker free?

GPS Test Satellite Tracker is free to download, with in-app purchases available.

### Which has better reviews, Tomstrails GPS UTM or GPS Test Satellite Tracker?

Tomstrails GPS UTM is rated higher. Tomstrails GPS UTM averages 4.8 out of 5 from 1.6K ratings, while GPS Test Satellite Tracker averages 3.5 from 2 ratings.

### Do Tomstrails GPS UTM or GPS Test Satellite Tracker have ads?

Neither Tomstrails GPS UTM nor GPS Test Satellite Tracker shows ads.

### Which is updated more often, Tomstrails GPS UTM or GPS Test Satellite Tracker?

Tomstrails GPS UTM ships an update every 6 weeks, and GPS Test Satellite Tracker every 3 months. Most recently, Tomstrails GPS UTM was updated on October 29, 2026 and GPS Test Satellite Tracker on October 29, 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.*