# GTD Brain vs Subnotes

The clearest difference is device support: Subnotes at 3 against GTD Brain's 1. GTD Brain's advantage is iOS requirement (16.0 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | GTD Brain | Subnotes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 12 MB | 3 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Minosin AB](https://appshunter.io/developer/6786407496) | [Martin Ramsin](https://appshunter.io/developer/1896778730) |

## What reviewers say

### GTD Brain

[App page](https://appshunter.io/ios/app/gtd-brain/id6786407494)

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

**In-app purchases:** none


### Subnotes

[App page](https://appshunter.io/ios/app/subnotes/id6787954455)

**In-app purchases:** none


## Frequently asked questions

### Is GTD Brain free?

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

### Is Subnotes free?

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

### Do GTD Brain or Subnotes have ads?

Neither GTD Brain nor Subnotes shows ads.

### Which is updated more often, GTD Brain or Subnotes?

GTD Brain ships an update weekly, and Subnotes weekly. Most recently, GTD Brain was updated on October 5, 2026 and Subnotes on October 9, 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.*