# Grid Ref GK vs TopoXY

The clearest difference is ads: Grid Ref GK at none against TopoXY's shown. Grid Ref GK also leads on iOS requirement (11.0 vs 17.0). TopoXY's advantage is update cadence (every 2 weeks vs every 12 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Grid Ref GK sells 1 one-off in-app purchase and TopoXY sells 5 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Grid Ref GK ships an update every 12 months, TopoXY every 2 weeks. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Grid Ref GK | TopoXY |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/grid-ref-gk-gau-kruger/id1146847858/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 5 MB | 47 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mike Irving](https://appshunter.io/developer/393933736) | [Darius Cirjan](https://appshunter.io/developer/1827010077) |

## What reviewers say

### Grid Ref GK

[App page](https://appshunter.io/ios/app/grid-ref-gk-gau-kruger/id1146847858)

This app helps you find your precise location using the Gauß-Krüger coordinate system, providing both GK grid references and WGS84 latitude/longitude. It displays the accuracy of your device's readings and allows you to easily share your location data via text, email, or other services. While primarily designed for use in Germany, it functions internationally and includes a guide to the GK system.

**Highlights:** Gauß-Krüger grid reference, WGS84 Latitude and Longitude, Device reading accuracy display, Location sharing (text, email, tweet), Copy location to clipboard, Graphical guide to GK system, International operation

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Ad Free | $0.99 | one-time |


### TopoXY

[App page](https://appshunter.io/ios/app/topoxy-coordinate-converter/id6758582908)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TopoXY Pro Weekly: GIS Tools | $2.99 | per 7 days |
| TopoXY Pro Monthly: GIS Tools | $6.99 | per month |
| TopoXY Pro Yearly: GIS Tools | $19.99 | per year |
| Stereo 70 Lifetime Offer | $27.99 | one-time |
| TopoXY Pro Lifetime: GIS | $39.99 | one-time |


## Frequently asked questions

### Is Grid Ref GK free?

Grid Ref GK is free to download, with in-app purchases available.

### Is TopoXY free?

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

### Do Grid Ref GK or TopoXY have ads?

TopoXY shows ads; Grid Ref GK does not.

### Which is updated more often, Grid Ref GK or TopoXY?

Grid Ref GK ships an update every 12 months, and TopoXY every 2 weeks. Most recently, Grid Ref GK was updated on November 2, 2026 and TopoXY on November 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*