Comparison

KruBoss Rollers vs BJJ Flash Cards

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

Head to head
About

KruBoss Rollers

Connect with the global Brazilian Jiu-Jitsu community. Discover gyms, find training partners, share your progress, and upload videos to engage with fellow enthusiasts. Customize your profile to represent your BJJ style.

Highlights
  • Discover BJJ gyms and mats
  • Advertise home gyms or rolling spaces
  • Connect with local BJJ fans
  • Track and share progress
  • Upload videos and engage
  • Customize Gi and NoGi profiles
Read full description

Welcome to Kruboss Rollers BJJ – Your Jiu-Jitsu Journey Starts Here Built by and for Brazilian Jiu-Jitsu enthusiasts, Kruboss Rollers BJJ is your ultimate hub to **connect, train, and grow** within the global BJJ community. Key Features - Discover BJJ gyms and mats near you – Whether you're traveling or new to the sport, find the best training spots with ease. - Advertise your own home gym or rolling space – Share your mat with others and build your local BJJ crew. - Connect with local BJJ fans and training partners – No more solo drills; find someone to roll with anytime, anywhere. - Share your journey – Track and showcase your progress, from stripe to black belt. - Upload videos and engage with the community – Post your best moves, match clips, or drills and get feedback, comments, and support. - Customize your profile for both Gi and NoGi – Your style, your setup—represent who you are on the mats. Whether you're a white belt dreaming of your first submission or a black belt coaching the next generation, Kruboss Rollers BJJ brings the community to your fingertips. Download now and take your Jiu-Jitsu lifestyle beyond the mats.

About

BJJ Flash Cards

This app helps you master Brazilian Jiu Jitsu techniques by using spaced repetition and active recall. It offers personalized review schedules and two practice modes: mental and physical. It acts as a comprehensive encyclopedia for grappling techniques.

Highlights
  • Personalized review scheduling
  • Active recall learning
  • Spaced repetition system
  • Mental practice mode
  • Physical practice mode
  • Technique encyclopedia
Features
Read full description

BJJ Flashcards ruthlessly attack the weaknesses in your Brazilian Jiu Jitsu game. Do you have gaps in your game because your schedule does not always match your instructor's curriculum? Does it sometimes feel like you are working on techniques that are below or above your level? Does it feel like a lot of what you learn in class does not stick? BJJ Flashcards were developed to solve these problems, by systematically teaching you the techniques of a well-rounded game and making sure they stick. . First, a concise video clip teaches you a technique. Next, you practice the technique and rate your mastery. Then, BJJ Flashcards schedules your next review according to your input. New and difficult techniques get more immediate reviews, while familiar and easier techniques get moved farther out. So, you are guided to always practice what needs improvement. MMA Flashcards adjusts to your level, regardless of how fast you learn or how often you practice, creating a custom path to mastery. It is like having a personal coach. BJJ Flashcards are based on the learning principles of active recall and spaced repetition, like Duo Lingo, Memrise, Babel and other language learning apps, used by millions of learners, Learning research has demonstrated that we learn fastest when we are challenged to remember information at increasing intervals, rather than by drilling the same information over and over. By harnessing the power of these learning principles, you accelerate your learning. BJJ Flashcards offer two complementary learning modes. In "Mental Practice" mode, you challenge yourself to create a detailed mental image of how a technique is performed, allowing you to reinforce the details of each technique, anywhere you have time to look at your phone. In "Physical Practice" mode, you work with a partner on the mat, deliberately practicing your techniques to make them faster and smoother. Mental Practice mode preloads techniques into your brain, allowing you to make the most of Physical Practice on the mat, while Physical Practice mode reveals the details that make a technique work, enhancing your mental practice. Each mode reinforces the other. BJJ Flashcards can also be used as an encyclopedia of fighting techniques, any time you have a problem in your game to solve. If you are having trouble escaping form side control when you spar, browse the side control category and add an escape technique to your reviews. Stop wasting money on expensive videos that never seem to translate to usable skills. Stop randomly grazing on YouTube and social media videos. BJJ Flashcards efficiently and effectively deliver the optimum technique for you to practice today, and makes it stick. Privacy Policy Link- https://app.bjjflashcards.com/Privacy-Policy Terms of Service Link- https://app.bjjflashcards.com/Mobile-App-Terms-of-Service

Screenshots

KruBoss Rollers4 screens
BJJ Flash Cards4 screens

Verdict

The call

The clearest difference is rating: KruBoss Rollers at 3.5 against BJJ Flash Cards's 3.0. KruBoss Rollers also leads on in-app purchases (none vs 2) and update cadence (monthly vs every 6 months). BJJ Flash Cards's advantage is ratings volume (6 vs 2). On price, review sentiment, ads and device support there is nothing between them.

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. BJJ Flash Cards sells 2 in-app purchases, starting at $99.99 per month. KruBoss Rollers asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KruBoss Rollers holds the better App Store score, 3.5 against 3.0. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

KruBoss Rollers ships an update monthly, BJJ Flash Cards every 6 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

Scorecard5 real differences · 5 level
KruBoss Rollers versus BJJ Flash Cards: the parameters behind the verdict, then further details
ParameterKruBoss RollersBJJ Flash Cards
PriceFreeFree
Rating3.5 (2 ratings) — better3.0 (6 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings26 — better
Update frequencyMonthly — betterEvery 6 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.013.0
Further details — not scored
Size48 MB34 MB
Age rating4+4+
DeveloperGlobules Interactive LimitedJon Zorn

Customer experience

KruBoss Rollers

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

BJJ Flash Cards

All ratings5 ratings
Positive40.0%
Neutral0.0%
Negative60.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

KruBoss Rollers

No in-app purchases

2 purchases

BJJ Flash Cards

Subscriptions2
  • Monthly$99.991 Month
  • Yearly$399.991 Year

Questions

Is KruBoss Rollers free?
KruBoss Rollers is free to download, with no in-app purchases.
Is BJJ Flash Cards free?
BJJ Flash Cards is free to download, with in-app purchases available.
Which has better reviews, KruBoss Rollers or BJJ Flash Cards?
KruBoss Rollers is rated higher. KruBoss Rollers averages 3.5 out of 5 from 2 ratings, while BJJ Flash Cards averages 3.0 from 6 ratings.
Do KruBoss Rollers or BJJ Flash Cards have ads?
Neither KruBoss Rollers nor BJJ Flash Cards shows ads.
Which is updated more often, KruBoss Rollers or BJJ Flash Cards?
KruBoss Rollers ships an update monthly, and BJJ Flash Cards every 6 months. Most recently, KruBoss Rollers was updated on October 24, 2026 and BJJ Flash Cards on October 23, 2026.

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