# Second Brain vs Nagi Planner

The clearest difference is in-app purchases: Second Brain at none against Nagi Planner's 2. Nagi Planner's advantage is update cadence (daily vs monthly) and device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. Nagi Planner sells 2 in-app purchases, starting at $4.99 per month. Second Brain asks for nothing beyond the download.

Second Brain ships an update monthly, Nagi Planner daily. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Second Brain | Nagi Planner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Size | 37 MB | 29 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Dcode](https://appshunter.io/developer/1868391710) | [MIKI SHOJI](https://appshunter.io/developer/6821204105) |

## What reviewers say

### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-ai-note/id6799343264)

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

**In-app purchases:** none


### Nagi Planner

[App page](https://appshunter.io/ios/app/nagi-planner/id6821204103)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| すべての機能（月額） | $4.99 | per month |
| すべての機能（買い切り） | $79.99 | one-time |


## Frequently asked questions

### Is Second Brain free?

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

### Is Nagi Planner free?

Nagi Planner is free to download, with in-app purchases available.

### Do Second Brain or Nagi Planner have ads?

Neither Second Brain nor Nagi Planner shows ads.

### Which is updated more often, Second Brain or Nagi Planner?

Second Brain ships an update monthly, and Nagi Planner daily. Most recently, Second Brain was updated on October 31, 2026 and Nagi Planner on November 1, 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.*