RollData vs Kimura
Kimura is an iOS-only note-taking app for BJJ techniques, letting users link related moves into a visual map and attach YouTube or Google Drive videos to each entry. It also bundles 100+ short lessons on stoicism and martial philosophy. Free accounts are capped at 20 techniques; most content sits behind a $9.99/month Pro subscription.
Feature Comparison
| Feature | RollData | Kimura |
|---|---|---|
| Session logging | ||
| Round-by-round detail | ||
| Technique tracking | ||
| Position-technique mapping | ||
| Partner tracking | ||
| Belt/promotion tracking | ||
| Training calendar | ||
| Progress analytics | ||
| Technique-linking visual map | ||
| Video embedding per technique | ||
| Curated lessons library | ||
| Web-based (no install) | ||
| Mobile app | ||
| Free tier |
- Session logging
- Round-by-round detail
- Technique tracking
- Position-technique mapping
- Partner tracking
- Belt/promotion tracking
- Training calendar
- Progress analytics
- Technique-linking visual map
- Video embedding per technique
- Curated lessons library
- Web-based (no install)
- Mobile app
- Free tier
- Session logging
- Round-by-round detail
- Technique tracking
- Position-technique mapping
- Partner tracking
- Belt/promotion tracking
- Training calendar
- Progress analytics
- Technique-linking visual map
- Video embedding per technique
- Curated lessons library
- Web-based (no install)
- Mobile app
- Free tier
Ready to start tracking your training?
Try RollData FreeKey Differences
Kimura's technique-linking graph is genuinely clever: connecting related moves into a visual map, then dropping in a YouTube clip for each one, makes for a fast, visual way to revisit what you learned in class right after a session, with none of the setup a spreadsheet needs.
Kimura logs techniques as standalone notes with no structured session or round data behind them, so there's no partner, position, or round history to analyze. RollData logs every round with the partner, position, and technique involved, building a real training history instead of a notebook.
Kimura caps free accounts at 20 techniques and puts roughly 90% of its library and lessons behind a $9.99/month subscription. RollData's free tier has no caps on sessions, techniques, partners, or history; only advanced analytics, competition logging, and training goals sit behind Pro, at $4.99/month.
The Verdict
Choose RollData if you want detailed tracking with features like round-by-round detail, position-technique mapping, partner tracking. Choose Kimura if you prioritize technique-linking visual map and video embedding per technique. Both are solid options for BJJ practitioners, and the right choice depends on how you prefer to track your training.
Frequently Asked Questions
- Is RollData better than Kimura?
- It depends on what you need. RollData offers features that Kimura doesn't, including Round-by-round detail, Position-technique mapping, Partner tracking. Kimura has its own strengths, including Technique-linking visual map and Video embedding per technique.
- Does Kimura track techniques by position?
- While Kimura offers basic technique tracking, it does not map techniques to positions. RollData's position-technique mapping lets you see which techniques you use from each position, revealing patterns in your game.
- Is RollData free?
- Yes, RollData offers a generous free tier that includes session logging, the technique library, training calendar, partner tracking, and more. Pro features are available for practitioners who want advanced analytics and insights.
For questions about RollData itself rather than this comparison, see the frequently asked questions.
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Last updated: 2026-09-20