This is a FREE app with European coverage that includes the UK, Ireland, Germany and the Netherlands, with charts that are easy to read.
The nautical charts app is derived from RNCs published by UKHO,
Waypoints and routes can be imported, exported and easily set up. There is a satellite overlay, road atlas and custom depth shading, it also features auto guidance with voice prompts and it records your track and allows you to query details about charted objects.
Premium features are available for a charge.
Available on iOS,Android,Windows, MacOS, Blackberry.