# B4i vs Grid Ref GK

The clearest difference is rating: Grid Ref GK at 4.3 against B4i's 3.5. Grid Ref GK also leads on iOS requirement (11.0 vs 15.0). B4i's advantage is in-app purchases (none vs 1) and update cadence (every 3 months vs every 12 months). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Grid Ref GK sells 1 one-off in-app purchase. B4i asks for nothing beyond the download.

Grid Ref GK holds the better App Store score, 4.3 against 3.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

B4i ships an update every 3 months, Grid Ref GK every 12 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | B4i | Grid Ref GK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (2 ratings)](https://appshunter.io/ios/app/b4i-coordinates-calculator/id915366768/reviews) | **[4.3 (3 ratings)](https://appshunter.io/ios/app/grid-ref-gk-gau-kruger/id1146847858/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 12 months |
| Monetization | Free | Free |
| Size | 17 MB | 5 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Erel Uziel](https://appshunter.io/developer/915366771) | [Mike Irving](https://appshunter.io/developer/393933736) |

## What reviewers say

### B4i

[App page](https://appshunter.io/ios/app/b4i-coordinates-calculator/id915366768)

This navigation tool converts between UTM and Lat/Lon coordinate systems, supporting various datums and formats. It displays current navigational information and allows sharing locations via SMS or email. Features include text-to-speech for coordinates and an animated compass.

**Highlights:** UTM to Lat/Lon conversion, Support for different datums, Current navigational information display, Location sharing via SMS/Email, Text-to-speech for coordinates, Animated compass

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is B4i free?

B4i is free to download, with no in-app purchases.

### Is Grid Ref GK free?

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

### Which has better reviews, B4i or Grid Ref GK?

Grid Ref GK is rated higher. B4i averages 3.5 out of 5 from 2 ratings, while Grid Ref GK averages 4.3 from 3 ratings.

### Do B4i or Grid Ref GK have ads?

Neither B4i nor Grid Ref GK shows ads.

### Which is updated more often, B4i or Grid Ref GK?

B4i ships an update every 3 months, and Grid Ref GK every 12 months. Most recently, B4i was updated on November 1, 2026 and Grid Ref GK on November 2, 2026.

---

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