# Ideaal Theorie vs KnowL

The clearest difference is in-app purchases: KnowL at none against Ideaal Theorie's 4. KnowL also leads on update cadence (every 2 weeks vs every 4 months) and device support. Ideaal Theorie's advantage is iOS requirement (13.0 vs 15.1). On price there is nothing between them.

Both are free to download. Ideaal Theorie sells 4 one-off in-app purchases. KnowL asks for nothing beyond the download.

Ideaal Theorie ships an update every 4 months, KnowL every 2 weeks. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Ideaal Theorie | KnowL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | — | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 89 MB | 43 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mustafa Said](https://appshunter.io/developer/1727914931) | [Knowl](https://appshunter.io/developer/1709480224) |

## What reviewers say

### Ideaal Theorie

[App page](https://appshunter.io/ios/app/ideaal-theorie/id6476828524)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access - 1 day | $6.99 | one-time |
| Premium Access – 7 Days | $11.99 | one-time |
| Premium Access – 1 Month | $22.99 | one-time |
| Premium Access – 2 Months | $34.99 | one-time |


### KnowL

[App page](https://appshunter.io/ios/app/knowl/id6689512423)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ideaal Theorie free?

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

### Is KnowL free?

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

### Which is updated more often, Ideaal Theorie or KnowL?

Ideaal Theorie ships an update every 4 months, and KnowL every 2 weeks. Most recently, Ideaal Theorie was updated on October 1, 2026 and KnowL on October 5, 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.*