# ZenZettel vs Know Time

The clearest difference is price: ZenZettel at Free against Know Time's $0.99. ZenZettel also leads on update cadence (every 2 months vs every 5 months). Know Time's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.1). On ads and device support there is nothing between them.

ZenZettel is free to download; Know Time costs $0.99 up front. ZenZettel sells 2 in-app purchases, starting at $0.99 per month. Know Time asks for nothing beyond the download.

ZenZettel ships an update every 2 months, Know Time every 5 months. The most recent releases landed on September 10, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | ZenZettel | Know Time |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zenzettel/id6744944376/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Freemium | — |
| Size | 41 MB | 30 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Ising Digital Sarl](https://appshunter.io/developer/1685735618) | [剑波 王](https://appshunter.io/developer/1595524797) |

## What reviewers say

### ZenZettel

[App page](https://appshunter.io/ios/app/zenzettel/id6744944376)

This app helps you build knowledge by transforming fleeting thoughts into permanent insights. It features a minimalist interface inspired by Japanese aesthetics, secure local storage, and AI-powered idea development. Organize your thoughts with smart tagging and advanced filtering.

**Highlights:** Impermanent note capture, AI-powered idea transformation, Advanced filtering, Minimalist interface, Secure local storage, Markdown export

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | per month |
| Premium | $9.99 | per year |


### Know Time

[App page](https://appshunter.io/ios/app/know-time/id6748224936)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZenZettel free?

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

### Is Know Time free?

Know Time costs $0.99, with no in-app purchases.

### Do ZenZettel or Know Time have ads?

Neither ZenZettel nor Know Time shows ads.

### Which is updated more often, ZenZettel or Know Time?

ZenZettel ships an update every 2 months, and Know Time every 5 months. Most recently, ZenZettel was updated on September 10, 2026 and Know Time on September 14, 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.*