Not clear to me what the OP wants to do. Is this for touring with camping, or homeless living? Work, school, home all have outlets to charge a phone after 4-8 hours riding.

If the bike computer keeps tab of how fast and how far you ride, a bike computer can be had for $30.

If you want help finding your way, you're probably looking at $200 or up for a GPS with routing.

The reputable USB charging solutions run about $100, on top of a $200 wheel with a dyno hub or a $30 stay-mounted generator. A spare charger for your phone costs, what, $20?