I've found threads debating the merits of GPS vs smartphone vs paper maps, and Ive seen some info for the Iphone, but for my upcoming cross county tour, Ive decided to carry paper maps, supported by my Android smartphone. Some of the route I will have planned before I depart, but some routing will be done on the road. Battery & data usage considerations require that I only access GPS or cell phone towers intermittently (ie I can't run with continuous GPS connection or continously download data) Here are my requirements:
1. Must be able to download and access maps offline.
2. Need to be able to get directions, modify route and..
3. Save route to offline maps
4. I'd like to have turn by turn instructions (dont need oral)
5. I'd like to track my mileage (at least daily, but over the entire multiday tour would be nice)
Here are the programs I've looked at or heard about, but, to my knowledge none seem to meet all my requirements.
Googlemaps - seems to have everything, except the ability to access (save) offline.