# TheChat vs Zettelkasten

The clearest difference is device support: TheChat at 3 against Zettelkasten's 1. TheChat also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. TheChat sells 2 one-off in-app purchases 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.

TheChat ships an update every 4 weeks, Zettelkasten monthly. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | TheChat | Zettelkasten |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Size | 64 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Pintube Ltd](https://appshunter.io/developer/1688363990) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### TheChat

[App page](https://appshunter.io/ios/app/thechat/id6740708878)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TheChat Credits | $4.99 | one-time |
| TheChat Credit | $9.99 | one-time |


### 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 TheChat free?

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

### Is Zettelkasten free?

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

### Do TheChat or Zettelkasten have ads?

Neither TheChat nor Zettelkasten shows ads.

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

TheChat ships an update every 4 weeks, and Zettelkasten monthly. Most recently, TheChat was updated on October 3, 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.*