# KnowTree vs Notes Den

The clearest difference is in-app purchases: Notes Den at none against KnowTree's 1. Notes Den also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. KnowTree sells 1 one-off in-app purchase. Notes Den asks for nothing beyond the download.

KnowTree ships an update every 9 days, Notes Den fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | KnowTree | Notes Den |
| --- | --- | --- |
| 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 | **No** |
| Update frequency | **Every 9 days** | Fortnightly |
| Size | 51 MB | 44 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | iPhone, iPod | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Ukon Ryohei](https://appshunter.io/developer/1834526187) | [Den Digital LLC](https://appshunter.io/developer/1882372039) |

## 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 |


### Notes Den

[App page](https://appshunter.io/ios/app/notes-den/id6778819317)

**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 Notes Den free?

Notes Den is free to download, with no in-app purchases.

### Do KnowTree or Notes Den have ads?

KnowTree shows ads; Notes Den does not.

### Which is updated more often, KnowTree or Notes Den?

KnowTree ships an update every 9 days, and Notes Den fortnightly. Most recently, KnowTree was updated on October 24, 2026 and Notes Den on October 24, 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.*