# KnoWhiz vs Once Upon a Drawing

The clearest difference is iOS requirement: KnoWhiz at 13.0 against Once Upon a Drawing's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. KnoWhiz sells 2 in-app purchases, starting at $2.99 per month and Once Upon a Drawing sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | KnoWhiz | Once Upon a Drawing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/knowhiz/id6670285646/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Monetization | Free with in-app purchases | — |
| Size | 31 MB | 26 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Curastone CORP.](https://appshunter.io/developer/1609919101) | [Sweetwater Urban Farms](https://appshunter.io/developer/1732326920) |

## What reviewers say

### KnoWhiz

[App page](https://appshunter.io/ios/app/knowhiz/id6670285646)

This AI-powered tool transforms your study materials into structured digital flashcards. It automatically generates and refines flashcard content based on your learning objectives or provided text, streamlining exam preparation.

**Highlights:** AI-powered flashcard generation, Structured content adjustment, Input learning objectives, Process textual materials, Digital flashcard creation

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KnoWhiz Plus Monthly | $2.99 | per month |
| KnoWhiz Premium Monthly | $9.99 | per month |


### Once Upon a Drawing

[App page](https://appshunter.io/ios/app/once-upon-a-drawing/id6795355979)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Story Credits | $12.99 | one-time |
| 5 Story Credits | $19.99 | one-time |
| 10 Story Credits | $34.99 | one-time |


## Frequently asked questions

### Is KnoWhiz free?

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

### Is Once Upon a Drawing free?

Once Upon a Drawing is free to download, with in-app purchases available.

### Do KnoWhiz or Once Upon a Drawing have ads?

Neither KnoWhiz nor Once Upon a Drawing shows 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.*