# topoXpress vs GPSlogger Kalman

The clearest difference is in-app purchases: topoXpress at none against GPSlogger Kalman's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. GPSlogger Kalman sells 1 one-off in-app purchase. topoXpress asks for nothing beyond the download.

topoXpress ships an update every 5 weeks, GPSlogger Kalman monthly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | topoXpress | GPSlogger Kalman |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/topoxpress/id1500467308/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 27 MB | 15 MB |
| Requires iOS | **17.5** | 17.6 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [TopoLynx GIS & Mapping Ltd](https://appshunter.io/developer/1500467307) | [Almansor Kerroum](https://appshunter.io/developer/1521553556) |

## What reviewers say

### topoXpress

[App page](https://appshunter.io/ios/app/topoxpress/id1500467308)

This application provides robust GIS and surveying tools for field data collection and analysis. It supports both online and offline operations with a wide range of spatial data formats and powerful visualization functions. Designed for professionals, it facilitates collaborative mapping and extensive GNSS receiver integration.

**Highlights:** Multiplatform GIS and surveying functionality, Handles large spatial datasets (raster/vector), Online and offline data operation, Powerful GIS visualization functions, Productive data collection tools, Collaborative mapping via cloud service, Extensive GNSS receiver support

**Features:** macOS Compatibility

**In-app purchases:** none


### GPSlogger Kalman

[App page](https://appshunter.io/ios/app/gpslogger-kalman/id1521553554)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $3.99 | one-time |


## Frequently asked questions

### Is topoXpress free?

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

### Is GPSlogger Kalman free?

GPSlogger Kalman is free to download, with in-app purchases available.

### Do topoXpress or GPSlogger Kalman have ads?

Neither topoXpress nor GPSlogger Kalman shows ads.

### Which is updated more often, topoXpress or GPSlogger Kalman?

topoXpress ships an update every 5 weeks, and GPSlogger Kalman monthly. Most recently, topoXpress was updated on November 3, 2026 and GPSlogger Kalman on November 7, 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.*