# Jiritsu vs Second Brain

The clearest difference is in-app purchases: Jiritsu at none against Second Brain's 1. Jiritsu also leads on update cadence (every 2 days vs every 3 months). Second Brain's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Second Brain sells 1 one-off in-app purchase. Jiritsu asks for nothing beyond the download.

Jiritsu ships an update every 2 days, Second Brain every 3 months. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Jiritsu | Second Brain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 months |
| Size | 28 MB | 25 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TAISEI IDE](https://appshunter.io/developer/1829858362) | [Selahattin Bozat](https://appshunter.io/developer/1895293163) |

## What reviewers say

### Jiritsu

[App page](https://appshunter.io/ios/app/jiritsu-focus-and-productivity/id6749286200)

**In-app purchases:** none


### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-notes-and-knowledge/id6775839727)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Brain Premium | $9.99 | one-time |


## Frequently asked questions

### Is Jiritsu free?

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

### Is Second Brain free?

Second Brain is free to download, with in-app purchases available.

### Do Jiritsu or Second Brain have ads?

Neither Jiritsu nor Second Brain shows ads.

### Which is updated more often, Jiritsu or Second Brain?

Jiritsu ships an update every 2 days, and Second Brain every 3 months. Most recently, Jiritsu was updated on September 21, 2026 and Second Brain on September 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.*