# Pocket Brain vs Second Brain

The clearest difference is in-app purchases: Pocket Brain at none against Second Brain's 2. Pocket Brain also leads on iOS requirement (14.0 vs 17.0). Second Brain's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

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

Pocket Brain ships an update every 8 days, Second Brain weekly. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Pocket Brain | Second Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/second-brain-know-yourself/id6760254340/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | — | Freemium |
| Size | 44 MB | 12 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MIGUEL ALVAREZ LESMES](https://appshunter.io/developer/1782050151) | [Liwei Xie](https://appshunter.io/developer/1106616046) |

## What reviewers say

### Pocket Brain

[App page](https://appshunter.io/ios/app/pocket-brain-ai-second-brain/id6738719152)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Pocket Brain free?

Pocket Brain 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 Pocket Brain or Second Brain have ads?

Pocket Brain shows ads; Second Brain does not.

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

Pocket Brain ships an update every 8 days, and Second Brain weekly. Most recently, Pocket Brain was updated on September 10, 2026 and Second Brain on September 8, 2026.

---

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