Inspiration

Social media today is passive. We scroll, like, and forget. So we built a platform that turns watching into doing, friends into motivators, and time online into personal growth. Instead of consuming content, what if your feed challenged you back?

What it does

Tag! is a social challenge and media app where users record a quick skill, tag a friend to try it, and prove it with a video. Every challenge becomes a growing chain, with videos verified by AI, a leaderboard with XP, and streaks. Users can also browse an Explore feed, where an AI-powered recommendation system shows trending challenges.

How we built it

Frontend: Flutter (Dart) for cross-platform mobile UX Auth & user data: Firebase Authentication + Firestore Media processing: AWS S3 for video storage AI Verification Engine: AWS Bedrock + TwelveLabs API to check if videos match challenge