# Second Brain vs Nemos

The clearest difference is update cadence: Nemos at every 5 days 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. Second Brain sells 1 one-off in-app purchase and Nemos sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Second Brain ships an update every 3 months, Nemos every 5 days. The most recent releases landed on September 24, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Second Brain | Nemos |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Size | 25 MB | 373 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Selahattin Bozat](https://appshunter.io/developer/1895293163) | [Mohamed Taha Baalla](https://appshunter.io/developer/1846620349) |

## What reviewers say

### 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 |


### Nemos

[App page](https://appshunter.io/ios/app/nemos-bookmark-files-and-notes/id6791134304)

**Features:** macOS Compatibility, Safari Extension, Apple Watch app, Vision Pro support, SharePlay

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Némos Pro Weekly | $4.99 | per 7 days |
| Némos Pro Monthly | $12.99 | per month |
| Némos Pro Yearly | $79.99 | per year |


## Frequently asked questions

### Is Second Brain free?

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

### Is Nemos free?

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

### Do Second Brain or Nemos have ads?

Neither Second Brain nor Nemos shows ads.

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

Second Brain ships an update every 3 months, and Nemos every 5 days. Most recently, Second Brain was updated on September 24, 2026 and Nemos on September 17, 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.*