# Second Brain vs Triad

The clearest difference is in-app purchases: Triad at none against Second Brain's 1. Triad also leads on update cadence (weekly vs every 3 months) and iOS requirement (13.0 vs 15.0). Second Brain's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Second Brain sells 1 one-off in-app purchase. Triad asks for nothing beyond the download.

Second Brain ships an update every 3 months, Triad weekly. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Second Brain | Triad |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Weekly** |
| Size | 25 MB | 57 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Selahattin Bozat](https://appshunter.io/developer/1895293163) | [Bimal Khatri](https://appshunter.io/developer/6776717251) |

## 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 |


### Triad

[App page](https://appshunter.io/ios/app/triad-notes-reminders-water/id6783898099)

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

**In-app purchases:** none


## Frequently asked questions

### Is Second Brain free?

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

### Is Triad free?

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

### Do Second Brain or Triad have ads?

Triad shows ads; Second Brain does not.

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

Second Brain ships an update every 3 months, and Triad weekly. Most recently, Second Brain was updated on October 1, 2026 and Triad on October 12, 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.*