# KnowTree vs Clairo

The clearest difference is ads: Clairo at none against KnowTree's shown. Clairo also leads on update cadence (every 2 days vs every 9 days). KnowTree's advantage is iOS requirement (15.1 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. KnowTree sells 1 one-off in-app purchase and Clairo sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

KnowTree ships an update every 9 days, Clairo every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | KnowTree | Clairo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/knowtree/id6757321205/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 15 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ukon Ryohei](https://appshunter.io/developer/1834526187) | [Yajima Shunnosuke](https://appshunter.io/developer/1872253430) |

## What reviewers say

### KnowTree

[App page](https://appshunter.io/ios/app/knowtree/id6757321205)

Organize your thoughts and information hierarchically with parent-child relationships. Supports Markdown, images, and code blocks for rich note-taking. Offers flexible workflows and powerful search capabilities.

**Highlights:** Hierarchical note organization, Markdown support, Flexible workflow (top-down/bottom-up), Rich content (images, links, code), Search across all nodes, Backup and restore functionality, Multiple tree management (premium)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KnowTree Premium | $4.99 | one-time |


### Clairo

[App page](https://appshunter.io/ios/app/clairo-ai-plan-and-list-maker/id6761840104)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月額プラン | $2.99 | per month |
| 年額プラン | $22.99 | per year |


## Frequently asked questions

### Is KnowTree free?

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

### Is Clairo free?

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

### Do KnowTree or Clairo have ads?

KnowTree shows ads; Clairo does not.

### Which is updated more often, KnowTree or Clairo?

KnowTree ships an update every 9 days, and Clairo every 2 days. Most recently, KnowTree was updated on October 31, 2026 and Clairo on October 31, 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.*