# BJJ Master App by Grapplearts vs KruBoss Rollers

The clearest difference is review sentiment: BJJ Master App by Grapplearts at 82% against KruBoss Rollers's 0%. BJJ Master App by Grapplearts also leads on rating (4.7 vs 3.5) and ratings volume (73 vs 2). KruBoss Rollers's advantage is in-app purchases (none vs 17) and iOS requirement (13.0 vs 16.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. BJJ Master App by Grapplearts sells 17 one-off in-app purchases. KruBoss Rollers asks for nothing beyond the download.

BJJ Master App by Grapplearts holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: BJJ Master App by Grapplearts has 73 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 82% of BJJ Master App by Grapplearts's written reviews are positive against 0% of KruBoss Rollers's.

BJJ Master App by Grapplearts ships an update every 3 weeks, KruBoss Rollers monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BJJ Master App by Grapplearts | KruBoss Rollers |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (73 ratings)](https://appshunter.io/ios/app/bjj-master-app-by-grapplearts/id1308072068/reviews)** | [3.5 (2 ratings)](https://appshunter.io/ios/app/kruboss-rollers/id1372458267/reviews) |
| Number of ratings | **73** | 2 |
| Positive reviews | **81.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 53 MB | 48 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Grapplearts Enterprises Inc.](https://appshunter.io/developer/539545697) | [Globules Interactive Limited](https://appshunter.io/developer/978694053) |

## What reviewers say

### BJJ Master App by Grapplearts

[App page](https://appshunter.io/ios/app/bjj-master-app-by-grapplearts/id1308072068)

Learn essential Brazilian Jiu-Jitsu techniques with comprehensive instructionals. Develop confidence in all aspects of ground fighting and grappling. This app provides a structured plan to master BJJ, making it accessible for self-defense and competition.

**Highlights:** Learn BJJ techniques, Instructionals from Grapplearts.com, Develop grappling confidence, Master ground fighting, Submission grappling techniques, Structured learning plan

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grapplearts Submission Defense | $3.99 | one-time |
| Grapplearts BJJ Submissions | $3.99 | one-time |
| Grapplearts BJJ Guard Sweeps | $3.99 | one-time |
| 7 Days to Better Guard Sweeps | $6.99 | one-time |
| Gripfighting & Kuzushi Bundle | $29.99 | one-time |
| Rolling Backtakes for Everyone | $29.99 | one-time |
| Self Defense Guard - Bundle | $29.99 | one-time |
| Open Guard System - Bundle | $34.99 | one-time |
| Non-Stop BJJ - Bundle | $49.99 | one-time |
| Closed Guard System - Bundle | $49.99 | one-time |
| BJJ Formula - Bundle | $59.99 | one-time |
| Pressure Passing (Bundle) | $59.99 | one-time |
| BJJ Games | $69.99 | one-time |
| Bigger, Stronger 1 - Bundle | $69.99 | one-time |
| BJJ Foundations Instructional | $79.99 | one-time |
| BJJ for Old F***s - Bundle | $79.99 | one-time |
| Modern Leglock Formula Bundle | $89.99 | one-time |

**What reviewers like**

- 👍 Great instructor and content
- 👍 Clear and detailed instruction
- 👍 Well-organized app
- 👍 Good value for money
- 👍 Excellent customer support

**What reviewers complain about**

- 🐛 Lost access to purchased content
- 🐛 Cannot restore purchases
- 🐛 App not functioning as expected
- 🐛 Poorly executed 'all-in-one' app
- 🐛 No response from customer service

**Reported bugs**

- Lost in app purchases during update
- Lost access to purchased volumes after upgrade
- No previously purchased apps loaded
- No option to restore purchases
- Cannot get previously purchased apps onto the 'All in one' app

**Requested features**

- Make paid content available offline
- Add takedown techniques
- Include free modules with basic techniques
- Fix sound issues on iPhone


### KruBoss Rollers

[App page](https://appshunter.io/ios/app/kruboss-rollers/id1372458267)

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

**In-app purchases:** none


## Frequently asked questions

### Is BJJ Master App by Grapplearts free?

BJJ Master App by Grapplearts is free to download, with in-app purchases available.

### Is KruBoss Rollers free?

KruBoss Rollers is free to download, with no in-app purchases.

### Which has better reviews, BJJ Master App by Grapplearts or KruBoss Rollers?

BJJ Master App by Grapplearts is rated higher. BJJ Master App by Grapplearts averages 4.7 out of 5 from 73 ratings, while KruBoss Rollers averages 3.5 from 2 ratings.

### Do BJJ Master App by Grapplearts or KruBoss Rollers have ads?

Neither BJJ Master App by Grapplearts nor KruBoss Rollers shows ads.

### Which is updated more often, BJJ Master App by Grapplearts or KruBoss Rollers?

BJJ Master App by Grapplearts ships an update every 3 weeks, and KruBoss Rollers monthly. Most recently, BJJ Master App by Grapplearts was updated on October 23, 2026 and KruBoss Rollers on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*