Define a MVP (minimum viable product) which is the minimum functionality that produces something useful and/or interesting. Implement that. I use Strava et al. myself. I'd say the MVP would include recording and storing and exporting the tracks. Then add your real-time team tracking feature.
Define a MVP (minimum viable product) which is the minimum functionality that produces something useful and/or interesting. Implement that. I use Strava et al. myself. I'd say the MVP would include recording and storing and exporting the tracks. Then add your real-time team tracking feature.