BOCO: Shadow Boxing Combos is a unique Android app designed for users with prior boxing experience, offering a rhythm-based training platform. It allows users to create custom boxing combinations using various punches and defensive moves, such as jabs, crosses, and slips. The app features an easy-to-use editor that enables users to personalize their training flows by deleting, reordering, and customizing their combos to match their style.

The app includes a BPM-based metronome and voice cues to help maintain rhythm during workouts, simulating the experience of having a personal coach. BOCO supports multiple languages, making it accessible to a wider audience, although voice cues are currently limited to English. Users can track their progress with detailed summaries after each session, and the option to share workout achievements is also available, providing motivation for continued training.