# ZettelkastenNote vs Ki

The clearest difference is rating: Ki at 5.0 against ZettelkastenNote's 3.0. Ki also leads on update cadence (every 2 days vs every 6 days). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. ZettelkastenNote sells 1 one-off in-app purchase and Ki sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Ki holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

ZettelkastenNote ships an update every 6 days, Ki every 2 days. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | ZettelkastenNote | Ki |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/zettelkastennote/id6747979814/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ki-note/id6761021371/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 2 days** |
| Monetization | Free | Free |
| Size | 10 MB | 4 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shoetsu Kawasato](https://appshunter.io/developer/1329390999) | [Juan Casanueva](https://appshunter.io/developer/427769040) |

## What reviewers say

### ZettelkastenNote

[App page](https://appshunter.io/ios/app/zettelkastennote/id6747979814)

Capture and connect ideas as small cards to build a growing web of knowledge. This app offers a distraction-free interface for organizing thoughts and creating structured insights. Your data remains private, stored locally or optionally in iCloud, with no tracking or ads.

**Highlights:** Capture ideas as atomic cards, Connect related ideas, Drag & drop reordering, Local-first data design, Optional iCloud sync, Offline functionality

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZettelkastenNote Pro | $0.49 | one-time |


### Ki

[App page](https://appshunter.io/ios/app/ki-note/id6761021371)

Capture, organize, and connect all your learning in one place. This app allows you to save notes, links, code snippets, and ideas, then link them together to build a web of knowledge. Find anything fast with full-text search and visual knowledge graphs.

**Highlights:** Capture notes, links, quotes, code snippets, and ideas, Organize with color-coded tags and custom topics, Connect notes with bidirectional linking, Visualize knowledge with interactive graphs, Full-text search and saved searches, Quick capture via floating button and widgets, Review workflow for managing notes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a coffee | $0.99 | one-time |


## Frequently asked questions

### Is ZettelkastenNote free?

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

### Is Ki free?

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

### Which has better reviews, ZettelkastenNote or Ki?

Ki is rated higher. ZettelkastenNote averages 3.0 out of 5 from 3 ratings, while Ki averages 5.0 from 2 ratings.

### Do ZettelkastenNote or Ki have ads?

Neither ZettelkastenNote nor Ki shows ads.

### Which is updated more often, ZettelkastenNote or Ki?

ZettelkastenNote ships an update every 6 days, and Ki every 2 days. Most recently, ZettelkastenNote was updated on October 11, 2026 and Ki on October 18, 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.*