# InkMark vs Kioku

The clearest difference is in-app purchases: Kioku at none against InkMark's 2. Kioku also leads on update cadence (every 2 days vs weekly). InkMark's advantage is device support (3 vs 1) and iOS requirement (16.6 vs 26.0). On price and ads there is nothing between them.

Both are free to download. InkMark sells 2 in-app purchases, starting at $1.99 per month. Kioku asks for nothing beyond the download.

InkMark ships an update weekly, Kioku every 2 days. The most recent releases landed on October 7, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | InkMark | Kioku |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Size | 18 MB | 51 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Diego Varela](https://appshunter.io/developer/1863244532) | [Kai Kang](https://appshunter.io/developer/1757164832) |

## What reviewers say

### InkMark

[App page](https://appshunter.io/ios/app/inkmark/id6756934550)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| InkMark Pro Monthly | $1.99 | per month |
| InkMark Pro Yearly | $19.99 | per year |


### Kioku

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

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

**In-app purchases:** none


## Frequently asked questions

### Is InkMark free?

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

### Is Kioku free?

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

### Do InkMark or Kioku have ads?

Neither InkMark nor Kioku shows ads.

### Which is updated more often, InkMark or Kioku?

InkMark ships an update weekly, and Kioku every 2 days. Most recently, InkMark was updated on October 7, 2026 and Kioku on September 29, 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.*