Randori
BJJ, Jiu Jitsu & Judo Tracker
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Tap in, roll, tap out. Your class lands in Apple Health with real heart rate from any Bluetooth strap. Belt, stripes and mat time counted for BJJ, judo, wrestling, MMA.
Track your heart rate while doing jiu jitsu, judo, wrestling, MMA, or sambo. Track your effort, take notes, learn what to do in every situation, connect with your training partners, and see how close your next belt or grade really is.
GET CREDIT FOR YOUR HARD WORK
Tap in and get to rolling. After class, tap out: your workout lands in Apple Fitness and Health with honest calories, shown to you before they're written. You can't wear a watch while grappling, so strap on any Bluetooth heart-rate sensor and every session carries your real measured heart rate, minute by minute, colored by effort from easy to max. Arm a class before you gear up and it records itself from your Lock Screen.
YOUR TRAINING, FINALLY COUNTED
A trained-day calendar that shows your consistency at a glance. Effort by Session: every class as a bar, colored by how hard your heart worked against your own measured max. Check in at your gym with a single location fix that's matched to the venue and immediately discarded.
EVERY SPORT, ONE BODY, ONE RECORD
Train more than one art and each gets its own room: your jiu jitsu belt and stripes, your judo grade in your federation's colors, your wrestling seasons, your sambo level, your MMA fight record. Matches and fights count honestly into your competitions and your card. Mat time follows the sport you tapped in for.
FOR PARENTS
Add your child to your own phone and keep their record where you can see it: every class you tap them in for, the belt they wear, the degrees as the professor awards them, on the real kids belts. Switch between your training and theirs with a tap. No birthdate, no photo leaves your phone, nothing measured: a child's record never touches Apple Health. Photograph the academy's attendance card and the days it marks become classes on the record, read on your phone and never kept. When they have a phone of their own, hand the record over whole.
FOR TEENS
Your own phone, your own record, on the youth belts. Join your academy as under 18 and they see your name, your belt and the days you trained there, no photo and no heart rate, until the day you say you are 18. A record that began on a parent's phone moves to yours with a code.
KNOW HOW CLOSE YOU ACTUALLY ARE
Every belt, stripe, and grade you've earned, with the real dates. Randori reads your training and gives you an honest range for what's next: a window, not a date. Your professor decides.
EVERYONE YOU TRAIN WITH, IN ONE PLACE
Connect with training partners, coaches, and professors by trading profile cards in person. They'll see your sessions, posts, and promotions, so you can cheer and encourage each other. No strangers, no follower counts, no algorithm. A directory of jiu jitsu academies plus judo, wrestling, MMA, and sambo clubs to name your gym.
STOP GETTING CAUGHT BY THE SAME THING
Write what happened tonight and Randori hands you the answer, on film, from instructors worth learning from. A skill tree for each sport, from the first day to the master tier, with technique names the way they're said in your language. Video plays through YouTube's own player, never copied. The suggestion engine runs entirely on your iPhone; your words never leave the device.
YOUR TRAINING STAYS YOURS
No account, no ads, no tracking, no streak theater. Your workouts live in Apple Health on your device; your rank, posts, and profile ride your own iCloud, shared user-to-user only with partners you invited. The one server of ours is the academy link, and it holds only what you switched on, for as long as you leave it on.
Built for jiu jitsu. Works for judo, wrestling, MMA, and sambo: every grappling art where a wearable doesn't survive the round.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Randori 2.0.4 — who is this for?
• The first question is who this Randori is for: you, your child, or you under 18. Each answer asks only what that record needs.
• Add a child. Their classes, the belt they wear and every degree, on the real kids belts, on your phone and your own iCloud. Tap them in, call class over, keep their notes. Switch between your training and theirs from the Profile tab, with their face on it. No birthdate, nothing measured: a child's record never touches Apple Health.
• Their attendance card, read by your phone: photograph the card, check the days it found, record them. The picture is read on the phone and not kept.
• The promotion card: their belt, their degrees and the academy's name, to share from your phone as you choose.
• Join your child to your academy under your own link. The professor sees a first name, the belt and the days of class, nothing else, and the degree they award lands on your child's belt.
• When they have a phone of their own, hand the record over whole: a code read aloud, or a file if there is no academy. Under 18 on your own phone: the youth belts on your own record, and the academy sees your name, belt and days, no photo, no heart rate, until the day you say you are 18.
• Your academy has left Experiments: join with a code or the printed QR. The academy card and the week's topic, the professor's attested promotions on your belt road, a weekly digest on your phone. Your number for the desk at the academy, on the academy card.
• Heart-rate monitor: one question, "Do you have a heart rate monitor?", then the pairing or the shelf for your country.
• A session under three minutes with no heartbeats on the day you install is a look, not a class. Plan your next class from there; Randori reminds you a minute after it ends.
The developer, Christopher Crosley, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
- Identifiers
- Other Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Christopher Crosley
- Size
- 125.6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
English and 11 more
- English, Arabic, French, German, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
13+
- 13+
- Infrequent
Realistic Violence
Contains
User-Generated Content
- In-App Purchases
Yes
- Annual $99.99
- Monthly $9.99
- Copyright
- © 2026 Blake Crosley
