Oss - Your BJJ Tracker

OSS — The BJJ Training Tracker
Train with intention. Progress with proof.
Built by Brazilian Jiu-Jitsu practitioners and black belts, Oss is the all-in-one training tracker designed to help you remember more, improve faster, and stay consistent on the mats.
Because what gets tracked… gets better.
1. Log every roll in seconds
Stop relying on memory after class.
• Quick session logging
• Gi / No-Gi auto detection
• Training, open mat, seminars, competitions
• Techniques, notes, photos
• Weight tracking with Apple Health
• Designed for speed — log in under 10 seconds
Walk off the mat → log → done.
2. Build your personal game
Your Jiu-Jitsu is unique. Your tracker should be too.
• 500+ built-in techniques
• Organized by position & submission
• Track what you actually drill
• See your most used attacks
• Add custom techniques
• Discover your real game over time
Turn chaos into clarity.
3. Belt & stripe progression
Celebrate every milestone.
• Visual belt timeline
• Stripe tracking
• Promotion history
• Coaches & academies
• Photos and memories
• Time spent at each rank
Your journey deserves to be remembered.
4. Competition tracking
Prepare like a competitor.
• Log tournaments & superfights
• Results, divisions, placements
• Fight counts & notes
• Plan upcoming events
• Countdown to competition day
Review. Adjust. Win.
5. Powerful insights & analytics
Train smarter, not just harder.
• Yearly training heatmap
• Consistency tracking
• Hours trained
• Session frequency
• Most drilled techniques
• Filters by academy or timeframe
See patterns. Fix weaknesses. Level up faster.
6. Your academies & coaches
Never forget who shaped your game.
• Track where you trained
• Log instructors per session
• Stats by academy
• Your complete BJJ lineage
Your story on the mats.
7. Designed like an Apple app should be
Fast. Minimal. Beautiful.
• Smooth animations
• Dark mode
• Gesture-first design
• Works perfectly on iPhone & iPad
• Zero clutter
Built for everyday use.
8. Privacy first. Always.
Your journey is yours alone.
• No accounts
• No ads
• No tracking
• No subscriptions
• All data stays on your device
Just pure training focus.
Perfect for
• White belts building fundamentals
• Competitors optimizing camp
• Coaches tracking curriculum
• Data-driven athletes
• Anyone serious about improvement
Gi or No-Gi. Hobbyist or world champion.
If you train — Oss belongs on your phone.
No subscriptions. No ads. No nonsense.
Just Jiu-Jitsu.
Download Oss and start tracking today.
Oss