TripWeave: a real-time convoy tracking

TripWeave: a real-time convoy tracking app I designed and built on my own in Flutter + Firebase. Friends driving separately join a trip with a 6-character code and see every vehicle live on one map, with the route to a shared destination. Background GPS keeps working with the screen locked, server-side security rules validate every write, and it's live on Google Play testing at zero running cost. Full case study: github.com/Nikhil-1501/tripweave-case-study