EthicalGopher/Ojas ? reverse-engineered prompt

Build me a mobile fitness app called Ojas that uses the phone camera to track workouts in real time, count clean reps, and give live feedback on form so people can work out safely without sending camera frames off the device.

I want it to feel like a fun fitness game too, with human vs AI workout battles, quick 2 minute challenges, difficulty levels, streaks, daily challenges, and a way to add friends and send battle invites. It should also include a posture scan that checks basic alignment and then recommends exercises to help improve it.

Please make the Android app polished and easy to use, with a strong home screen, exercise selection, workout tracking, and results after each session. Use the backend for multiplayer rooms, live syncing, login, and saved progress. If you need current docs for any of the tools, look them up online first.