# knockOut Study vs Shadow Say

The clearest difference is in-app purchases: Shadow Say at none against knockOut Study's 3. Shadow Say also leads on iOS requirement (13.0 vs 15.5). On price, ads and device support there is nothing between them.

Both are free to download. knockOut Study sells 3 in-app purchases, starting at $8.99 per month. Shadow Say asks for nothing beyond the download.

## The numbers

| Metric | knockOut Study | Shadow Say |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 306 MB | 25 MB |
| Requires iOS | 15.5 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MAKSYM KHAMAD](https://appshunter.io/developer/1823494759) | [Nghia Tran](https://appshunter.io/developer/1843015722) |

## What reviewers say

### knockOut Study

[App page](https://appshunter.io/ios/app/knockout-study/id6747940497)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| knockOut Pro Monthly | $8.99 | per month |
| knockOut Pro Monthly | $73.90 | per year |
| knockOut Pro Life | $99.99 | one-time |


### Shadow Say

[App page](https://appshunter.io/ios/app/shadow-say/id6758030271)

**In-app purchases:** none


## Frequently asked questions

### Is knockOut Study free?

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

### Is Shadow Say free?

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

### Do knockOut Study or Shadow Say have ads?

Neither knockOut Study nor Shadow Say 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.*