# KnowTree vs 忘れ物ゼロ

The clearest difference is in-app purchases: 忘れ物ゼロ at none against KnowTree's 1. KnowTree's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. KnowTree sells 1 one-off in-app purchase. 忘れ物ゼロ asks for nothing beyond the download.

## The numbers

| Metric | KnowTree | 忘れ物ゼロ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/knowtree/id6757321205/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 9 days | — |
| Size | 51 MB | 8 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ukon Ryohei](https://appshunter.io/developer/1834526187) | [satoshi amasaki](https://appshunter.io/developer/1891268722) |

## 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 |


### 忘れ物ゼロ

[App page](https://appshunter.io/ios/app/id6769013627)

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

**In-app purchases:** none


## Frequently asked questions

### Is KnowTree free?

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

### Is 忘れ物ゼロ free?

忘れ物ゼロ is free to download, with no in-app purchases.

### Do KnowTree or 忘れ物ゼロ have ads?

Both KnowTree and 忘れ物ゼロ show ads.

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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.*