Show HN: I built an Android OS in the browser

Category: ai-ml

Tags: mobile-gym, gui-agent, reinforcement-learning, simulation-platform, parallel-rollouts

Score: 8.3/10 (Innovation: 8, Technical: 9, Documentation: 8, Utility: 8)

MobileGym is a browser-hosted, fully programmable mobile OS simulation platform designed for GUI agent research. It enables deterministic state inspection, parallel rollouts, and sim-to-real transfer, achieving a 40.7 point real-device gain after GRPO training. Its unique combination of structured state snapshots, sub-millisecond judges, and extreme scalability fills a critical gap in reinforcement learning for mobile agents.

Target audience: AI researchers, ML engineers, mobile agent developers, reinforcement learning practitioners

Repository: https://mobilegym.dev/ · TypeScript · Apache-2.0 · 228 stars

View on Hacker News