Keyfuels is a free Android application developed by C H Jones Limited for Keyfuels cardholders to locate the nearest sites where their card can be used. With Keyfuels, users can display these sites on a map, view them in a list, and see their details, including opening times and address. Additionally, the app allows users to open iPhone Maps with a route to a selected site.

The app uses the location capabilities of the user's phone to determine their current location and download the nearest sites, which can be displayed on a map or listed in ascending order of distance from the current location. Users can also select sites appropriate to their vehicle type, with options for all Keyfuels sites, LCV/Car sites, and HGV sites only. Keyfuels includes context-sensitive help screens, and it uses mobile data to download the nearest sites and maps in a compact data format.

Overall, Keyfuels is a useful app for Keyfuels cardholders who need to find nearby sites to use their card, with easy-to-use features and accurate location information.