Can anyone recommend a Voice Navigation app for this device. I've tried the 'GPS Voice Navigation' app, which is OK as long as you don't mistakenly go off-route, when it goes bananas.
FWIW, Maps on W10M has turn by turn with voice and draws from the HERE database for its mapping. Yes you can download the same mapping data as HERE for offline nav with Maps. Also in W10M you can save maps to SD card.
You cannot download voicepacks to get a nav voice distinct from system voice.
You can import HERE Collections to Maps Favorites in the latest versions of Maps.
If you need additional help or have more questions or details to share, please join the site so you can reply in this thread. See this link for instructions on how to join Windows Central.