iPhone Screenshots


Make the most of your adventures in the great outdoors with OS Locate. Used alongside your Ordnance Survey map, OS Locate is a fast and highly accurate means of pinpointing your exact location on the map, anywhere in Great Britain. If you have lost your bearings or simply would like a little reassurance, OS Locate is the ideal companion for all enthusiasts of the great outdoors.

The app converts GPS location readings from your mobile phone to Ordnance Survey National Grid references, enabling you to determine precisely where you are on an Ordnance Survey map. No mobile signal? No problem; OS Locate does not require a mobile signal to function – the inbuilt GPS system can be relied upon, even in the most remote areas.

Simply download the app and switch on your device’s location services (Settings – Privacy – Location services).

OS Locate is packed with additional features. The ‘Share’ button allows you to connect with friends and family via messaging and social media – let them know where you are, how your adventure is progressing and what time you will be home. Use the handy digital compass to take your bearings – always ensuring you are on the right track. For those who are keen to learn more about maps and navigation, the ‘About’ button hosts a wealth of information including hints and tips and a guide to map reading. In addition, you will find simple yet comprehensive guides on how to use eastings and northings.

OS Locate – know where you are.

OS Locate is a complementary tool for Ordnance Survey paper maps. You should always have an Ordnance Survey paper map and baseplate compass when exploring the great outdoors.

Continued use of GPS running in the background can dramatically decrease battery life.

Please ensure your Location Services are turned on.

OS Locate has been updated to provide even greater peace of mind by providing accurate altitude information. As this is taken from the GPS signal, it will always be available.

Also new for version 1.1, OS Locate will automatically detect whether you are outside Great Britain, and convert Ordnance Survey’s Northing and Easting location information into internationally recognised Latitude and Longitude readings, which can be used anywhere in the world.

Finally, Ordnance Survey has partnered with Silva Compasses to update the virtual compass feature to use Silva’s trademarked design for greater usability.

What’s New

Version 1.5

Support for iOS13.
We are working on an issue with the OS Locate Watch app – the next update will solve this in the next few days, please accept our apologies for any inconvenience this causes in the meantime.

Ratings and Reviews

4.7 out of 5
3K Ratings

3K Ratings

Geobobs ,

Works so well

Really great to have location (really accurate) altitude (really accurate) and direction (also really accurate) all in one screen. Then to still have the silva compass simulation too, amazing! All for everyone’s favourite price of free!! And no ads too! I’m impressed and now very tempted to get a full subscription to OS maps to enjoy the full ecosystem. This is a must, an essential app for anyone who enjoys the outdoors.

Hillhound ,

Looks good but limitations

Really like the look of this app. Quick clean and simple screens.
I have two issues however.
Firstly it only goes to 6 figure grid ref, whereas my mapping app of choice will give 10 digit ref.
Secondly It only seems to work for GB grid, however I am in Northern Ireland which is part of the UK, so no use here. I appreciate that there may be issues as the whole of Ireland uses Irish Grid but surely easy enough to sort out. Again, my map app of choice can sort this as can any cheap dedicated gps unit.
Sort these two things out and I will give it 5 stars.

Crazyhazy123 ,

10 figure please?

The OS maps app (which I’m a paid subscriber) gives a 10 figure grid reference, this app however stops at 6, which, unless I’m wrong is a potential difference in accuracy of 100 metres! I’m looking for a simple Apple Watch app to display my current location in (BNG) to use in conjunction with my explorer maps whilst out walking. Is there a reason for the difference in accuracy between your two apps? To have a simple display with gps accuracy and grid reference literally ‘to hand’ and be able to leave the phone in the backpack all day would be a godsend.


Ordnance Survey
44.2 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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