Best Tool for UK Travel

Used NAVFREE UK & ROI last year (2012) while i travelled Peak District, Lake District, and went across Yorkshire Dales North Yorkshire. Most of the time through small unnamed back road close to the C2C walkway. It was the first time I used this app. I was not sure how accurate ad reliable it was, so I also got a GPS (sat nav) from car rental too. NAVFREE proved to be more useful, providing better route options, and bigger screen (on iPad).
Im going to UK again this summer. And this time Ill use NAVFREE, and save GPS rental money for more English Heritage visits.

Zxini about Navmii Offline GPS