# KnowTree vs 思考整理カード

The clearest difference is in-app purchases: 思考整理カード at none against KnowTree's 1. 思考整理カード also leads on ads (none vs shown). KnowTree's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. KnowTree sells 1 one-off in-app purchase. 思考整理カード asks for nothing beyond the download.

KnowTree ships an update every 9 days, 思考整理カード fortnightly. The most recent releases landed on September 8, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | KnowTree | 思考整理カード |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Fortnightly |
| Size | 51 MB | 4 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ukon Ryohei](https://appshunter.io/developer/1834526187) | [SANWA Inc.](https://appshunter.io/developer/1878028373) |

## What reviewers say

### KnowTree

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

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

**In-app purchases (1)**

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


### 思考整理カード

[App page](https://appshunter.io/ios/app/id6760861536)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KnowTree free?

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

### Is 思考整理カード free?

思考整理カード is free to download, with no in-app purchases.

### Do KnowTree or 思考整理カード have ads?

KnowTree shows ads; 思考整理カード does not.

### Which is updated more often, KnowTree or 思考整理カード?

KnowTree ships an update every 9 days, and 思考整理カード fortnightly. Most recently, KnowTree was updated on September 8, 2026 and 思考整理カード on September 25, 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.*