# Cardma vs Zettelkasten

The clearest difference is update cadence: Cardma at every 3 days against Zettelkasten's monthly. Cardma also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Cardma sells 4 in-app purchases, starting at $3.99 per month and Zettelkasten sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Cardma ships an update every 3 days, Zettelkasten monthly. The most recent releases landed on September 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Cardma | Zettelkasten |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Monthly |
| Size | 63 MB | 6 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [chung-Ying Xie](https://appshunter.io/developer/1292685929) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Cardma

[App page](https://appshunter.io/ios/app/cardma/id6747955972)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plus | $3.99 | per month |
| Monthly Pro | $7.99 | per month |
| Annual Plus | $29.99 | per year |
| Annual Pro | $79.99 | per year |


### Zettelkasten

[App page](https://appshunter.io/ios/app/zettelkasten-notes-graph/id6771281468)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $9.99 | per 7 days |
| Yearly | $49.99 | per year |


## Frequently asked questions

### Is Cardma free?

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

### Is Zettelkasten free?

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

### Do Cardma or Zettelkasten have ads?

Neither Cardma nor Zettelkasten shows ads.

### Which is updated more often, Cardma or Zettelkasten?

Cardma ships an update every 3 days, and Zettelkasten monthly. Most recently, Cardma was updated on September 29, 2026 and Zettelkasten on October 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.*