Grid Ref UK and Ireland is a free app available for Android devices. It allows users to locate their current map reference location anywhere in the United Kingdom or Ireland. The app provides GB Grid Ref, Irish Grid Ref, OSGB36, and WGS84 Latitude and Longitude values.

This app is particularly useful for those who rely on Ordnance Survey (OS) Maps in Great Britain and Ordnance Survey Ireland and Ordnance Survey Northern Ireland (OSNI) Maps. The grid references provided are given to 3 digits, and the accuracy of readings is shown based on the device's indication. Users can easily share their location via text, email, tweet, or copy to the clipboard, depending on their device's setup.

Grid Ref UK and Ireland is designed for use in the British Isles, and it includes a graphical guide to the GB and Irish National Grids. It is ideal for walkers, hikers, and outdoor sports enthusiasts. However, it is recommended to always carry a map and physical compass when engaging in outdoor pursuits.

To ensure accurate readings, the app should be used in a flat position, similar to a traditional compass. It is best to use it in an open space, away from trees, buildings, and sources of interference. The screen can be set to stay on for continued on-screen display of grid reference information.

Please note that the app is ad-supported, but users have the option to remove all ads and get 10-figure grid references through an in-app purchase. Grid Ref UK and Ireland is compatible with handsets that feature GPS hardware, and users may need to grant the app permission to use this information.