# GridPoint GB — Find yourself on an OS map

> Locate yourself on Ordnance Survey maps using GPS and compass. (iPhone/iPad app by George MacKerron.)

- Source: https://appshunter.io/ios/app/gridpoint-gb/id314445598 (this page in markdown: same URL + `.md`)
- Developer: [George MacKerron](https://appshunter.io/developer/314445601)
- Category: Navigation
- Price: Free with in-app purchases
- Rating: 4.70/5 from 39 App Store ratings · 65 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 23 MB
- Languages: American English
- Released: 2012-01-04
- Data updated: 2026-07-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/gridpoint-gb/id314445598/reviews.md

## What is GridPoint GB?

If you have a paper Ordnance Survey (OS) map, GridPoint GB makes it easy to locate yourself — even when you've got no mobile reception.

The app uses your iPhone's GPS and compass to provide your current grid reference and heading, and illustrates how to use this to locate yourself on the map. Coordinate conversions are implemented via OS's OSTN02, accurate to within 1m.

The app also:

* Includes an Apple Watch app and associated complication
* Reports full numerical easting and northing, tetrad, raw latitude/longitude, a nearby postcode, and various heading parameters
* Has a sharing facility so you can share, copy or store your location
* Calculates next sunset and sunrise times
* Can emit a distress signal, just in case

All features are free to use — the in-app purchase is simply a tip you can give the developer to show appreciation.

For details and instructions, please see http://mackerron.com/gridpointgb/

Please note: this app works ONLY in Britain (i.e. England, Scotland or Wales). It does not operate in other parts of the UK or British Isles and cannot provide coordinates in Northern Ireland or the Republic of Ireland, since a different coordinate system is used.

## Key features

- GPS and compass for location
- Accurate coordinate conversions
- Apple Watch app and complication
- Location sharing
- Sunset and sunrise times
- Distress signal

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Magnificent tip | $2.99 | one-time |
| Majestic tip | $4.99 | one-time |
| Monumental tip | $8.99 | one-time |


## Recent user reviews (10 of 65)

All indexed reviews: https://appshunter.io/ios/app/gridpoint-gb/id314445598/reviews.md

### 5/5 — Brilliant

*2022-11-11, version 2.4*

Super fast location device that just works. Picks up even in aeroplane mode so even with a low battery it can keep going. Managed to conclude a trip with 10% battery so the app itself is frugal with battery. Can't rate it highly enough

### 5/5 — Excellent

*2022-04-03, version 2.4*

Incredibly useful app for anyone involved in natural history and gathering records for moth/butterfly/bird/vegetation etc atlases because it tells you what tetrad you are in.

### 5/5 — Simple yet brilliant

*2021-05-22, version 2.4*

I usually trust my map-reading skills, but there are times when you just need some reassurance; a second opinion that you are where you think you are! Having this on my watch is fantastic. No more fiddling around with gloves, pockets and phone passwords to get a proper OS grid reference. Other info is a bonus. Thank you!!

### 5/5 — A must have app for walkers, and climbers alike.

*2021-04-14, version 2.3*

Download this app, ensure that’s it’s on your phone before you go out into the wilds, and hope that it remains an unused, waste of space on your phone.

The app does exactly what it says on the tin. It gives you your location, in a number of formats. From grid reference, to Lat & Lan and more besides.  And it does not require a mobile signal to work. Just GPS. 

When you need it, it could be a life saver.

### 5/5 — Excellent with a paper map

*2021-04-07, version 2.3*

I am a Viewranger user as well as having a high end Garmin GPS. However I always carry a paper map and this app is really good for relating its gps position to your position on a paper map. This is down to the clever and unique (as far as I know) graphic representation of the relevant grid. OK, you could argue that it would be better with an OS map layer under the graphic but that would mean buying or subscribing to digital OS maps. The thing for me is that it encourages me to use the paper map and helps me read grid references more easily. 
 Another great feature is that you can see the difference between grid, true and magnetic north. It would be good perhaps if you could also see grid magnetic angle without having to work it out but maybe in a future update? 
 All in all a clever and effective app for anyone from a casual user to a professional. 
Andy

### 5/5 — Excellent App!

*2021-01-03, version 2.3*

I’m a wildlife recorder and use various tools for collecting data in the field. This app has a simple but elegant interface that is easy to understand and very useful.

### 5/5 — Best quick nav check

*2020-06-20, version 2.3*

I have lots of Nav Apps and this is THE BEST by far. I’m in the military and most of the time I just need a quick check to support my tired map reading. I would give 5+ if I could see an 8 Fig grid and Alt displayed on a complication on the watch at ALL times - brilliant!

### 5/5 — Great App for botanical surveying

*2020-01-13, version 2.3*

This is a brilliant app for any surveying botanist or any other ecologist. It displays your position within a monad. 
Would be great if you could switch to tetrad view.

### 5/5 — Would be nice nice to be able to change to 6 Fig Grid

*2020-01-02, version 2.2*

Great product but can we have the option to change to 6 fig grid next🤞

### 4/5 — Good but one request

*2019-06-10, version 2.1*

Works very well.  I use it to record locations but have to remember what order they come in.  If you could record a small note each time a location is saved this app would get 5 stars.

## Frequently asked questions about GridPoint GB

### What does GridPoint GB do?

GridPoint GB helps you find your exact location on a paper Ordnance Survey (OS) map, even when you have no mobile signal. It uses your iPhone's GPS and compass to provide your grid reference and heading, and explains how to use this information to pinpoint yourself on the map.

### What are the key features of GridPoint GB?

Key features include accurate coordinate conversions using OS's OSTN02, an Apple Watch app with complications, reporting of detailed grid references (easting, northing, tetrad, latitude/longitude), nearby postcode, and heading parameters. It also offers location sharing, sunset/sunrise time calculations, and a distress signal function.

### Is GridPoint GB free to use?

Yes, all core features of GridPoint GB are free to use. The app offers an in-app purchase that functions as a voluntary tip to the developer to show appreciation for their work.

### What devices is GridPoint GB compatible with?

GridPoint GB is designed for iPhones and also includes an associated app and complication for Apple Watch. It requires your device to have GPS and compass capabilities to function.

### Where can I use GridPoint GB?

This app works exclusively in Britain, which includes England, Scotland, and Wales. It is not designed for or compatible with Northern Ireland or the Republic of Ireland due to differences in coordinate systems used in those regions.

## Version history (last 5 releases)

### 2.5.1 — 2024-11-14

Fixed an issue on Apple Watch where the heading display in grid view updated only when the location also changed

### 2.5 — 2024-11-13

* Heading is now displayed in grid view on Apple Watch
* Updated postcodes data

### 2.4 — 2021-05-05

Browse and buy Explorer and Landranger maps. Updated postcode data, and one or two tiny fixes.

### 2.3 — 2020-01-11

Updated the postcodes data set (CodePoint Open) to the latest edition, plus a few minor tweaks and fixes.

### 2.2 — 2019-08-14

App for Apple Watch, with complication. Nearby postcode display on iPhone.

## Apps similar to GridPoint GB

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Postcodes & Postbox Search](https://appshunter.io/ios/app/postcodes-and-postbox-search/id868407023) | 4.6 (2,457) | Free | Navigation |
| [OS Maps: Walk, Hike, Run, Bike](https://appshunter.io/ios/app/os-maps-walk-hike-run-bike/id978307846) | 4.7 (426) | Free | Navigation |
| [UK Map](https://appshunter.io/ios/app/uk-map/id365745482) | 3.3 (7) | $9.99 | Navigation |
| [OS2Maps](https://appshunter.io/ios/app/os2maps/id1368620189) | — | $1.99 | Navigation |
| [GPS Locate](https://appshunter.io/ios/app/gps-locate/id1475887688) | 4.0 (2) | $0.99 | Navigation |
| [MX Map Mobile](https://appshunter.io/ios/app/mx-map-mobile/id1180917855) | — | Free | Navigation |

## Related topics

[gridpoint gb](https://appshunter.io/ios/topics/gridpoint-gb) · [gridpoint](https://appshunter.io/ios/topics/gridpoint)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-10.*