GB Grid Converter vs GPS OS Grid Reference
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GB Grid Converter
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.
- 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
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Easily convert between British National Grid References (OS Grid Refs) and Latitude, Longitude coordinates (both OSGB36 and WGS84 are supplied). Then, easily view the converted coordinate in the Maps app, or send it to GPS Log (our app for recording your travels). Or copy to the clipboard using the standard iPhone functions. Fuzzy parsing logic allows you to input coordinates in a variety of ways, like "TQ 30267 76930", and "TQ302769". If you have any problems using this software, please contact us by email: support-at-gpslog.com so we can work with you to solve the problem. Issues left as reviews are difficult to address.
GPS OS Grid Reference
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.
- Offline map location
- Accurate grid references
- Waypoint creation and management
- High-contrast display
- Battery optimization
- Share waypoints
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GPS OS provides a fast and accurate way to locate your position on an Ordnance Survey map, both in Great Britain and Ireland. • No phone signal required - works in the most remote locations. • OSTN15 transform data for high conversion accuracy (better than 1m). • 6, 8 and 10 figure grid references. • A large, clear, high contrast display ensures you can easily read your position in any light conditions. • Optimises the frequency of position updates depending on battery charge and speed of travel to make sure you can always make calls at the end of the day. • Create waypoints from a map, your current location or manually enter Ordnance Survey coordinates. • Explore waypoints and get directions in Apple Maps. • Share waypoints with other apps or users. • No adverts. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Includes OSTN15 transform data licensed with permission. Copyright and database rights Ordnance Survey Limited 2016, ©Crown copyright and database rights Land and Property Services 2016 and/or ©Ordnance Survey Ireland, 2016. All rights reserved.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | GB Grid Converter | GPS OS Grid Reference |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.4 (17 ratings) |
| Positive reviews | 75.9% of reviews | 89.9% of reviews — better |
| Number of ratings | 1 | 17 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 16.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 10 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Geospike Pty Ltd | Tomstrails.com |
Customer experience
GB Grid Converter
GPS OS Grid Reference
Bugs and requests
GB Grid Converter
Not enough reviews yet to summarise bugs or requests.
GPS OS Grid Reference
Reported bugs
5 issues- 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
10 requests- 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
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- Display latitude and longitude
- Add a dynamic display for accuracy improvement
- Implement time averaging for accuracy
- Allow copying grid reference to clipboard
- Add facility to store and recall reference information
In-app purchases
GB Grid Converter
- GB Grid Converter Premium$10.00
GPS OS Grid Reference
- Premium Features7 Days trial$5.991 Year
- Feature Pack - Compass & sharing features.Free
Questions
Is GB Grid Converter free?
Is GPS OS Grid Reference free?
Which has better reviews, GB Grid Converter or GPS OS Grid Reference?
Do GB Grid Converter or GPS OS Grid Reference have ads?
Which is updated more often, GB Grid Converter or GPS OS Grid Reference?
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