Dark Matter Jiu Jitsu
Korey Kerber Health & Fitness iPhoneiPadiPod touch
Dark Matter Jiu Jitsu is a free Health & Fitness app for iPhone and iPad by Korey Kerber. Rated 5.0/5 from 1 ratings. Requires iOS 15.1.
- Rating
- 5.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 22 MB
- Age 12+
- Updated
- Apr 29
- 2026 · v1.1.0
Screenshots
About Dark Matter Jiu Jitsu
Dark Matter Jiu-Jitsu is your personal Jiu-Jitsu training companion. Track your classes, build streaks, earn badges, stay up to date at the academy, and watch technique videos. Features: Daily training streak tracking - stay motivated! Class attendance records - see your progress Badges & achievements - get rewarded Technique video library - improve your skills Goal setting - set targets and achieve them Points & rewards system - unlock achievements Age-verified and COPPA compliant for users 13+. Join Dark Matter Jiu-Jitsu and take your training to the next level!
What’s new
Version 1.1.0 · Updated April 29, 2026
New to 1.1.0 - New Pro Shop tab — browse Dark Matter merch (apparel, rashguards, patches, accessories) The "Pro Shop" tab in this update is a display-only catalog for physical gym merchandise (apparel, rashguards, patches, accessories). Members purchase items in person at our gym (cash, card, or check). There is no in-app purchase, no checkout flow, no external payment link, and no digital goods. Each product detail page shows photos, sizes, and the message "Available at the gym — see an instructor or front desk." - Tap notifications to view full details, with a delete option for ones you've read - Smoother keyboard handling across login, signup, profile editing, and more - Faster updates — bug fixes and improvements now arrive automatically - Date and time displays now show correctly in Phoenix time
App privacy
The developer, Korey Kerber, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Contact Info: Email Address, Name
- User Content: Photos or Videos
Used for: Analytics, App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Contact Info: Name
Used for: Analytics