# Second Brain vs AI Note Taker

The clearest difference is rating: AI Note Taker at 5.0 against Second Brain's 4.5. Second Brain's advantage is iOS requirement (17.0 vs 26.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Second Brain sells 2 in-app purchases, starting at $4.99 per month and AI Note Taker sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

AI Note Taker holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Second Brain ships an update every 9 days, AI Note Taker every 5 days. The most recent releases landed on October 10, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Second Brain | AI Note Taker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/second-brain-know-yourself/id6760254340/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ai-note-taker-private-notes/id6786475542/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 5 days** |
| Monetization | Freemium | Freemium |
| Size | 12 MB | 83 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Liwei Xie](https://appshunter.io/developer/1106616046) | [Hyun Sik Kim](https://appshunter.io/developer/1871784166) |

## What reviewers say

### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-know-yourself/id6760254340)

This AI-powered journal captures your thoughts via voice or text, automatically organizing and connecting them. It helps you recall memories, discover patterns, and reflect on your growth.

**Highlights:** AI classification, tagging, and summarization, Semantic search by meaning, Three-layer memory system, People cards for relationship tracking, Weekly AI reflections, Voice input with transcription, Data export (JSON + Markdown)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Brain Pro | $4.99 | per month |
| Second Brain Pro | $39.99 | per year |


### AI Note Taker

[App page](https://appshunter.io/ios/app/ai-note-taker-private-notes/id6786475542)

Capture thoughts via text, voice, or sharing from any app. This tool intelligently links new ideas to existing ones, allowing you to ask questions and receive sourced answers from your own notes. It also manages reminders and helps you reflect on your thoughts privately on-device.

**Highlights:** On-device AI processing, Capture by text, voice, and share, Sourced answers from your notes, Automatic idea linking, Set reminders, Reflection on recent themes, Works offline

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Pro Annual | $29.99 | per year |


## Frequently asked questions

### Is Second Brain free?

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

### Is AI Note Taker free?

AI Note Taker is free to download, with in-app purchases available.

### Which has better reviews, Second Brain or AI Note Taker?

AI Note Taker is rated higher. Second Brain averages 4.5 out of 5 from 2 ratings, while AI Note Taker averages 5.0 from 1 ratings.

### Do Second Brain or AI Note Taker have ads?

Neither Second Brain nor AI Note Taker shows ads.

### Which is updated more often, Second Brain or AI Note Taker?

Second Brain ships an update every 9 days, and AI Note Taker every 5 days. Most recently, Second Brain was updated on October 10, 2026 and AI Note Taker on September 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.*