Oss - Your BJJ Tracker

You train hard. You learn fast. But how much of it do you actually remember next week?

Oss is the BJJ training companion built for practitioners who got tired of forgotten techniques, vague progress, and spreadsheet hacks. Log a session in under 10 seconds — Gi or No-Gi — then watch your game evolve over months and years with data you can actually see.

Track every session with technique tagging, training type, photos, and notes. Browse 500+ pre-loaded techniques organized by position and filter by what you drill most. Capture every belt promotion with dates, photos, coach, and academy. Log tournaments, placements, and competition countdowns. A yearly training heatmap shows your consistency at a glance — and which months went quiet.

All your data lives on your iPhone or iPad. No account required. No cloud upload. No ads. Export everything anytime. Optional Apple Health integration for weight tracking.

Built by BJJ practitioners who wanted a training tool worthy of the sport.