# Folio vs Second Brain

The clearest difference is update cadence: Folio at every 3 weeks against Second Brain's every 3 months. Second Brain's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Folio sells 1 one-off in-app purchase and Second Brain sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Folio ships an update every 3 weeks, Second Brain every 3 months. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Folio | Second Brain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 44 MB | 25 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, Mac | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dinh Bao Thang Duong](https://appshunter.io/developer/1529449646) | [Selahattin Bozat](https://appshunter.io/developer/1895293163) |

## What reviewers say

### Folio

[App page](https://appshunter.io/ios/app/folio-markdown-library/id6765871325)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime | $9.99 | one-time |


### 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 Folio free?

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

### Is Second Brain free?

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

### Do Folio or Second Brain have ads?

Neither Folio nor Second Brain shows ads.

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

Folio ships an update every 3 weeks, and Second Brain every 3 months. Most recently, Folio was updated on September 30, 2026 and Second Brain on October 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.*