# KnowTree vs Mistake Board

The clearest difference is in-app purchases: Mistake Board at none against KnowTree's 1. Mistake Board 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. Mistake Board asks for nothing beyond the download.

KnowTree ships an update every 9 days, Mistake Board every 5 days. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | KnowTree | Mistake Board |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 5 days** |
| Size | 51 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ukon Ryohei](https://appshunter.io/developer/1834526187) | [昶 黄](https://appshunter.io/developer/1882273731) |

## 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 |


### Mistake Board

[App page](https://appshunter.io/ios/app/mistake-board/id6781180302)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is KnowTree free?

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

### Is Mistake Board free?

Mistake Board is free to download, with no in-app purchases.

### Do KnowTree or Mistake Board have ads?

KnowTree shows ads; Mistake Board does not.

### Which is updated more often, KnowTree or Mistake Board?

KnowTree ships an update every 9 days, and Mistake Board every 5 days. Most recently, KnowTree was updated on October 10, 2026 and Mistake Board on October 12, 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.*