# KnowTree vs Idea Outliner

The clearest difference is in-app purchases: Idea Outliner at none against KnowTree's 1. Idea Outliner also leads on ads (none vs shown). KnowTree's advantage is iOS requirement (15.1 vs 26.4). On price and device support there is nothing between them.

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

## The numbers

| Metric | KnowTree | Idea Outliner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | — |
| Size | 51 MB | 11 MB |
| Requires iOS | **15.1** | 26.4 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ukon Ryohei](https://appshunter.io/developer/1834526187) | [MyriApps, LLC](https://appshunter.io/developer/1892405209) |

## 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 |


### Idea Outliner

[App page](https://appshunter.io/ios/app/idea-outliner/id6762004911)

**In-app purchases:** none


## Frequently asked questions

### Is KnowTree free?

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

### Is Idea Outliner free?

Idea Outliner is free to download, with no in-app purchases.

### Do KnowTree or Idea Outliner have ads?

KnowTree shows ads; Idea Outliner does not.

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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.*