# NumberFun Kids vs CertBook

The clearest difference is in-app purchases: NumberFun Kids at none against CertBook's 6. NumberFun Kids also leads on iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. CertBook sells 6 one-off in-app purchases. NumberFun Kids asks for nothing beyond the download.

## The numbers

| Metric | NumberFun Kids | CertBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Size | 22 MB | 5 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BloomLabz Private Limited](https://appshunter.io/developer/6794216225) | [Tolga Saruslu](https://appshunter.io/developer/6806664022) |

## What reviewers say

### NumberFun Kids

[App page](https://appshunter.io/ios/app/numberfun-kids/id6797227304)

**Features:** macOS Compatibility

**In-app purchases:** none


### CertBook

[App page](https://appshunter.io/ios/app/certbook-sql-and-dba/id6806663780)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SQL Foundations Exams | $4.99 | one-time |
| Database Admin I Exams | $4.99 | one-time |
| Database Admin II Exams | $4.99 | one-time |
| AI Database Exams | $4.99 | one-time |
| Autonomous DB Exams | $4.99 | one-time |
| PL/SQL Development Exams | $4.99 | one-time |


## Frequently asked questions

### Is NumberFun Kids free?

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

### Is CertBook free?

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

### Do NumberFun Kids or CertBook have ads?

Neither NumberFun Kids nor CertBook 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.*