# BJJ Diary vs RollQuant

The clearest difference is in-app purchases: RollQuant at none against BJJ Diary's 1. BJJ Diary's advantage is update cadence (every 9 days vs monthly) and iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. BJJ Diary sells 1 in-app purchase, starting at $1.99 per month. RollQuant asks for nothing beyond the download.

BJJ Diary ships an update every 9 days, RollQuant monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | BJJ Diary | RollQuant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Size | 41 MB | 37 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Northfield Studio](https://appshunter.io/developer/1844151718) | [sho morimoto](https://appshunter.io/developer/1806275336) |

## What reviewers say

### BJJ Diary

[App page](https://appshunter.io/ios/app/bjj-diary-jiu-jitsu-journal/id6757426076)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 柔術日記 Plus | $1.99 | per month |


### RollQuant

[App page](https://appshunter.io/ios/app/rollquant/id6775637350)

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

**In-app purchases:** none


## Frequently asked questions

### Is BJJ Diary free?

BJJ Diary is free to download, with in-app purchases available.

### Is RollQuant free?

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

### Do BJJ Diary or RollQuant have ads?

Neither BJJ Diary nor RollQuant shows ads.

### Which is updated more often, BJJ Diary or RollQuant?

BJJ Diary ships an update every 9 days, and RollQuant monthly. Most recently, BJJ Diary was updated on October 24, 2026 and RollQuant on October 25, 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.*