# Second Brain vs Cadencia

The clearest difference is in-app purchases: Second Brain at none against Cadencia's 3. Cadencia's advantage is update cadence (weekly vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Cadencia sells 3 in-app purchases, starting at $8.99 per month. Second Brain asks for nothing beyond the download.

Second Brain ships an update every 3 weeks, Cadencia weekly. The most recent releases landed on September 10, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Second Brain | Cadencia |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 2 MB | 16 MB |
| Requires iOS | 17.6 | **16.2** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jikku Chacko](https://appshunter.io/developer/1882820555) | [Francois El-Daher](https://appshunter.io/developer/1884749613) |

## What reviewers say

### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-adhd-planner/id6760140172)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cadencia

[App page](https://appshunter.io/ios/app/cadencia-adhd-planner/id6760507102)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $8.99 | per month |
| Yearly | $44.99 | per year |
| Cadencia Pro Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Second Brain free?

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

### Is Cadencia free?

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

### Do Second Brain or Cadencia have ads?

Neither Second Brain nor Cadencia shows ads.

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

Second Brain ships an update every 3 weeks, and Cadencia weekly. Most recently, Second Brain was updated on September 10, 2026 and Cadencia on August 21, 2026.

---

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