# GB Grid Converter vs GPS OS Grid Reference

The clearest difference is rating: GB Grid Converter at 5.0 against GPS OS Grid Reference's 4.4. GB Grid Converter also leads on iOS requirement (16.6 vs 18.0). GPS OS Grid Reference's advantage is ratings volume (17 vs 1) and review sentiment (90% vs 76%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. GB Grid Converter sells 1 one-off in-app purchase and GPS OS Grid Reference sells 2 in-app purchases, starting at $5.99 per year. Whichever you choose, the download price is not the number that matters.

GB Grid Converter holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: GPS OS Grid Reference has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 76% of GB Grid Converter's written reviews are positive against 90% of GPS OS Grid Reference's, so the app with the better star average is not the one people write more warmly about.

GB Grid Converter ships an update every 2 months, GPS OS Grid Reference every 3 months. The most recent releases landed on September 14, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | GB Grid Converter | GPS OS Grid Reference |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gb-grid-converter/id382369923/reviews)** | [4.4 (17 ratings)](https://appshunter.io/ios/app/gps-os-grid-reference/id993436655/reviews) |
| Number of ratings | 1 | **17** |
| Positive reviews | 75.9% of reviews | **89.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 11 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Geospike Pty Ltd](https://appshunter.io/developer/500622151) | [Tomstrails.com](https://appshunter.io/developer/425642318) |

## What reviewers say

### GB Grid Converter

[App page](https://appshunter.io/ios/app/gb-grid-converter/id382369923)

This app converts British National Grid References to Latitude/Longitude coordinates and vice-versa. It supports both OSGB36 and WGS84 datums. You can view converted coordinates in Maps, send them to other apps, or copy them to your clipboard.

**Highlights:** Convert British National Grid to Lat/Long, Convert Lat/Long to British National Grid, Supports OSGB36 and WGS84, View coordinates in Maps app, Send coordinates to other apps, Copy coordinates to clipboard, Fuzzy parsing for input

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GB Grid Converter Premium | $10.00 | one-time |


### GPS OS Grid Reference

[App page](https://appshunter.io/ios/app/gps-os-grid-reference/id993436655)

This app accurately pinpoints your location on Ordnance Survey maps for Great Britain and Ireland, even without a phone signal. It offers precise grid references, waypoint creation, and navigation features. The display is designed for clarity in all lighting conditions, and it optimizes battery usage.

**Highlights:** Offline map location, Accurate grid references, Waypoint creation and management, High-contrast display, Battery optimization, Share waypoints

**Features:** Family Sharing, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features | $5.99 | per year |
| Feature Pack - Compass & sharing features. | Free | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🎯 Accurate grid references
- 🚀 Fast and quick updates
- 💡 Works without phone signal
- 🗺️ Useful for navigation and backup

**What reviewers complain about**

- 🐛 Blurry satellite maps
- 🧭 Compass not accurate
- 📉 Accuracy dropped recently
- 🗺️ No map data included
- 🚫 Cannot search locations

**Reported bugs**

- Waypoint finder satellite view is blurry
- Compass is not accurate
- Accuracy has dropped recently
- Location services permanently dimmed off (iOS)
- App does not work for users not in England

**Requested features**

- Add map data and search functionality
- Improve satellite map clarity
- Add ability to view location on a map
- Enable navigation from point to point
- Add Apple Watch equivalent app


## Frequently asked questions

### Is GB Grid Converter free?

GB Grid Converter is free to download, with in-app purchases available.

### Is GPS OS Grid Reference free?

GPS OS Grid Reference is free to download, with in-app purchases available.

### Which has better reviews, GB Grid Converter or GPS OS Grid Reference?

GB Grid Converter is rated higher. GB Grid Converter averages 5.0 out of 5 from 1 ratings, while GPS OS Grid Reference averages 4.4 from 17 ratings.

### Do GB Grid Converter or GPS OS Grid Reference have ads?

Neither GB Grid Converter nor GPS OS Grid Reference shows ads.

### Which is updated more often, GB Grid Converter or GPS OS Grid Reference?

GB Grid Converter ships an update every 2 months, and GPS OS Grid Reference every 3 months. Most recently, GB Grid Converter was updated on September 14, 2026 and GPS OS Grid Reference on September 22, 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.*