# twodos vs Scatterbrain

The clearest difference is in-app purchases: twodos at none against Scatterbrain's 2. twodos also leads on device support (4 vs 2). Scatterbrain's advantage is update cadence (weekly vs fortnightly) and iOS requirement (18.2 vs 26.5). On price and ads there is nothing between them.

Both are free to download. Scatterbrain sells 2 in-app purchases, starting at $6.99 per month. twodos asks for nothing beyond the download.

twodos ships an update fortnightly, Scatterbrain weekly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | twodos | Scatterbrain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 16 MB | 123 MB |
| Requires iOS | 26.5 | **18.2** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Afzaal Ahmad Zeeshan](https://appshunter.io/developer/1712161581) | [InnoWaveIT s.r.o](https://appshunter.io/developer/1884251577) |

## What reviewers say

### twodos

[App page](https://appshunter.io/ios/app/twodos-collaborative-todos/id6469541755)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### Scatterbrain

[App page](https://appshunter.io/ios/app/scatterbrain-adhd-priority/id6763551522)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scatterbrain Pro | $6.99 | per month |
| Scatterbrain Pro | $69.99 | per year |


## Frequently asked questions

### Is twodos free?

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

### Is Scatterbrain free?

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

### Do twodos or Scatterbrain have ads?

Neither twodos nor Scatterbrain shows ads.

### Which is updated more often, twodos or Scatterbrain?

twodos ships an update fortnightly, and Scatterbrain weekly. Most recently, twodos was updated on October 27, 2026 and Scatterbrain on October 28, 2026.

---

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