Comparison

GrapplingU vs Kurobi

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GrapplingU

Features
Read full description

GrapplingU is a Brazilian Jiu-Jitsu coaching platform built for students and coaches. FOR STUDENTS: - Track your training sessions, rolls, and games - Get personalized feedback synthesized from world-class instructors - Follow structured curriculum paths (Mount, Armbar, Side Control, Back Control & more) - Watch curated technique videos from John Danaher, Gordon Ryan, and more - Chat with an assistant that knows your training history - Track XP, streaks, and skill progression across BJJ systems FOR COACHES: - See every student's strengths, struggles, and progress at a glance - Manage your gym's class schedule - Assign games and drills to classes - Generate daily and weekly session summaries automatically - Assign weekly focus areas to individual students - Message students directly Terms of Use (EULA): https://www.grapplingu.com/terms.html Privacy Policy: https://www.grapplingu.com/privacy.html

About

Kurobi

Learn over 580 Brazilian Jiu-Jitsu techniques with interactive 3D models. Study moves step-by-step, explore follow-ups, and track your training progress. Access a comprehensive library of gi and no-gi grappling techniques.

Highlights
  • 580+ 3D BJJ techniques
  • Step-by-step move breakdown
  • View techniques from any angle
  • Linked follow-ups and counters
  • Browse by goal or search by name
  • Offline library and training logs
  • Track drills, rolls, and competitions
Features
Read full description

Explore 580+ Brazilian Jiu-Jitsu techniques in 3D. See how a move works, study it step by step and discover what to try next. WATCH BJJ TECHNIQUES FROM ANY ANGLE Rotate the 3D view, scrub through the movement and switch between top and bottom. Follow the blue fighter to understand the position and movement before your next training session. STEP BY STEP, SETUP TO FINISH Each technique includes a written guide covering the setup, movement and finish, with key details and common mistakes. Most also include selected instructional videos to help you study the technique. WHAT COMES NEXT, AND IF THEY BLOCK IT Explore linked follow-ups and alternatives when your opponent blocks a move. Where available, the “What's next” and “If they block” sections take you straight to another technique to study. FIND YOUR NEXT TECHNIQUE Browse by goal: submissions, back takes, control, guard passes, defence, escapes, sweeps and takedowns. Search by technique names and common aliases in English, Spanish or Portuguese. Save techniques in collections to revisit before training. Want something different? Open the crate to discover a technique you have not tried or revisit one getting rusty. For gi and no-gi grappling, from chokes and armbars to leg locks, guard passes and escapes. LOG ROLLS AND FLAG PROBLEMS Keep track of what you drilled, rolled and competed. Add notes, record how a session went and flag problems to revisit. Your technique history keeps your practice connected to what you are learning. SEE THE SHAPE OF YOUR GAME Compare the techniques you drill with the ones you use in rolls across eight goals. Spot areas you practise less and find something to study next. TAKE YOUR LIBRARY TO THE GYM The technique library and training logs work offline; your logs sync when you reconnect. Instructional videos require internet and may open in YouTube. Available in English, Spanish and Portuguese. KUROBI PRO Kurobi requires a Kurobi Pro subscription. Eligible new subscribers can start a 14-day free trial. After the trial it continues at the selected plan's price unless cancelled. Prices, trial eligibility and promotional terms are shown before you confirm. Manage or cancel in your Apple Account settings. To avoid renewal after a free trial, cancel at least 24 hours before it ends. Kurobi's library is a curated reference, not a complete one: names, details and variations differ between instructors, academies and rulesets, and the 3D fighters are schematic. It supports your learning and does not replace qualified in-person instruction, supervision or your own judgment. Discover. Learn. Drill. Terms of Use: https://kurobiapp.com/terms Privacy Policy: https://kurobiapp.com/privacy

Screenshots

GrapplingU4 screens
Kurobi4 screens

Verdict

The call

GrapplingU and Kurobi are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. GrapplingU sells 2 in-app purchases, starting at $19.99 per month and Kurobi sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

GrapplingU ships an update every 4 days, Kurobi every 2 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

ScorecardNo meaningful differences
GrapplingU versus Kurobi: the parameters behind the verdict, then further details
ParameterGrapplingUKurobi
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 4 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Subscription
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size40 MB72 MB
Age rating12+12+
DeveloperMARK DENYS YOUNGSONMark Isayan

In-app purchases

2 purchases

GrapplingU

Subscriptions2
  • Student Pro Monthly$19.991 Month
  • Student Pro Annual$179.991 Year
2 purchases

Kurobi

Subscriptions2
  • Kurobi Pro Monthly14 Days trial$9.991 Month
  • Kurobi Pro Yearly14 Days trial$97.991 Year

Questions

Is GrapplingU free?
GrapplingU is free to download, with in-app purchases available.
Is Kurobi free?
Kurobi is free to download, with in-app purchases available.
Do GrapplingU or Kurobi have ads?
Neither GrapplingU nor Kurobi shows ads.
Which is updated more often, GrapplingU or Kurobi?
GrapplingU ships an update every 4 days, and Kurobi every 2 days. Most recently, GrapplingU was updated on October 31, 2026 and Kurobi on November 5, 2026.

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