# Tomstrails GPS UTM vs RTKapp

The clearest difference is in-app purchases: RTKapp at none against Tomstrails GPS UTM's 1. RTKapp also leads on update cadence (every 3 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

Tomstrails GPS UTM ships an update every 6 weeks, RTKapp every 3 weeks. Both last shipped on October 18, 2026.

## The numbers

| Metric | Tomstrails GPS UTM | RTKapp |
| --- | --- | --- |
| 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 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 93 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Tomstrails.com](https://appshunter.io/developer/425642318) | [Juan Carlos Lopez Calvo](https://appshunter.io/developer/1876960144) |

## 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


### RTKapp

[App page](https://appshunter.io/ios/app/rtkapp/id6759115701)

**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 RTKapp free?

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

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

Neither Tomstrails GPS UTM nor RTKapp shows ads.

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

Tomstrails GPS UTM ships an update every 6 weeks, and RTKapp every 3 weeks. Most recently, Tomstrails GPS UTM was updated on October 18, 2026 and RTKapp on October 18, 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.*