The Good Free, locally stored maps and routing software for all 50 states, Canada, and Mexico make Navfree USA a great Google Maps alternative for off-the-grid navigation. It gets frequent updates from OpenStreetMap.org servers, and multiple languages are available.
The Bad Traffic data, lane guidance, and spoken street names aren't available. Many menu options are redundant.
The Bottom Line Navfree USA is about as basic as navigation apps get, but its ability to store local map data, its frequent updates, and the fact that it's free make it an invaluable tool for Android navigation.
Navfree USA: Free Satnav (Android)
Navfree USA is a North American localization of worldwide, crowdsourced and open-sourced GPS navigation software that is offered for free in the Android market. The world version of the app supports navigation in about 34 countries. Navfree USA chooses to focus on the 50 U.S. states, Canada, and Mexico.
There are two reasons someone would want to take a look at Navfree. Firstly, it's free. There are no charges for map downloads, updates, voices, or language packs. Secondly, the free maps are downloaded and stored locally, which means that you won't have to ping a server to download map tiles while on the road or to calculate and recalculate routes. There's also a third reason to consider and that's the warm and fuzzy feeling that you get when supporting open-source software -- if you're into that sort of thing.
Locally stored map data
After installing the app, the first thing that you'll want to do is to pop into the Upgrades section of the main menu to download the map data that Navfree will need for navigation. If you speak a language other than English or would simply like a different voice for your turn-by-turn directions, here's where you can download additional speech packs, as well.