# BlitzGTD vs Second Brain

The clearest difference is in-app purchases: Second Brain at none against BlitzGTD's 1. BlitzGTD's advantage is iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

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

BlitzGTD ships an update every 4 days, Second Brain every 2 days. The most recent releases landed on September 15, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | BlitzGTD | Second Brain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Size | 22 MB | 26 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sascha Krug](https://appshunter.io/developer/1698716188) | [kim dahye](https://appshunter.io/developer/1868391710) |

## What reviewers say

### BlitzGTD

[App page](https://appshunter.io/ios/app/blitzgtd/id6463464743)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BlitzGTD Pro | $5.99 | one-time |


### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-ai-note/id6799343264)

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

**In-app purchases:** none


## Frequently asked questions

### Is BlitzGTD free?

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

### Is Second Brain free?

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

### Do BlitzGTD or Second Brain have ads?

Neither BlitzGTD nor Second Brain shows ads.

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

BlitzGTD ships an update every 4 days, and Second Brain every 2 days. Most recently, BlitzGTD was updated on September 15, 2026 and Second Brain on September 23, 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.*