I, too, have been looking into doing offline navigation with my Android phone for an upcoming trip through Germany, France, Spain and Morocco.
What I have found out so far, is that there are no true
offline navigation apps out there. Here's three apps I have tried out, that support offline maps based on OSM data, which you have previously downloaded and transferred to your device:
: ability to calculate route offline, but excruciatingly slow for longer distances, so it's better to use an online service, which the app also supports. Has voice guidance.
: needs internet connection to calculate route. Automatic route-recalculation only in the paid version.
: needs internet connection to find addresses outside the US (you can use previously saved favorites, though). Calculation is offline. Voice guidance.
OsmAnd and Locus are techy, and have many features, ability to display many online maps etc., but especially Locus can be a little akward to use. NavFree has the nicest interface and good guidance.
Last edited by eljulian; 17 Jul 2012 at 17:27.