Free UK Canal and River map for Android:
Some features include
View Ordnance Survey maps
Find Canal features and navigation information
Find nearby pubs, supermarkets, water points, moorings and points of interest
View Historic OS maps
Search Wikipedia for nearby points of interest
View Satellite maps
Measuring tool
What3Words lookup from location on the map
Open location in Google maps
Find footpaths and towpaths
Find public transport links
Live canal stoppages information
And more….