# Kioku vs GNTK/AI

The clearest difference is in-app purchases: Kioku at none against GNTK/AI's 5. Kioku also leads on update cadence (every 2 days vs every 2 weeks). GNTK/AI's advantage is device support (4 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. GNTK/AI sells 5 in-app purchases, starting at $6.99 per month. Kioku asks for nothing beyond the download.

Kioku ships an update every 2 days, GNTK/AI every 2 weeks. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Kioku | GNTK/AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Size | 51 MB | 9 MB |
| Requires iOS | **26.0** | 26.4 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Kai Kang](https://appshunter.io/developer/1757164832) | [GNTK Holdings LLC](https://appshunter.io/developer/1896719658) |

## What reviewers say

### Kioku

[App page](https://appshunter.io/ios/app/kioku-private-second-brain/id6762234661)

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

**In-app purchases:** none


### GNTK/AI

[App page](https://appshunter.io/ios/app/gntkai/id6770150707)

**Features:** Apple Watch app

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GNTK/AI Plus | $6.99 | per month |
| GNTK/AI Small Teams - 5 Seats | $34.99 | per month |
| GNTK/AI BYOK - Annual | $49.99 | per year |
| GNTK/AI Small Teams - 10 Seats | $69.99 | per month |
| GNTK/AI Small Teams - 20 Seats | $139.99 | per month |


## Frequently asked questions

### Is Kioku free?

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

### Is GNTK/AI free?

GNTK/AI is free to download, with in-app purchases available.

### Do Kioku or GNTK/AI have ads?

Neither Kioku nor GNTK/AI shows ads.

### Which is updated more often, Kioku or GNTK/AI?

Kioku ships an update every 2 days, and GNTK/AI every 2 weeks. Most recently, Kioku was updated on November 9, 2026 and GNTK/AI on November 10, 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.*