I have the Navigon app. It's not cheap, almost $50.00, but it does allow you to purchase and download map sets for almost anywhere for offline use. https://itunes.apple.com/ca/app/navigon-north-america/id321506742?mt=8 This is the North American version. Versions for other areas are also sold, at varying prices.What's the best navigation app for iPhone?is tomtom any good as I been reading it isn't since iOS 7.i had it on the galaxy s3 and it was brilliant.can anyone recommend one that doesn't use data.ie offline maps