# D426 Mastery vs SQLPrep

The clearest difference is iOS requirement: SQLPrep at 15.1 against D426 Mastery's 17.6. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. D426 Mastery sells 2 in-app purchases, starting at $7.99 per month and SQLPrep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | D426 Mastery | SQLPrep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 weeks |
| Size | 4 MB | 27 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JOHN TIMOTHY DISALLE](https://appshunter.io/developer/1886538582) | [CHENG QIAO](https://appshunter.io/developer/6789642556) |

## What reviewers say

### D426 Mastery

[App page](https://appshunter.io/ios/app/d426-mastery/id6761743682)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $7.99 | per month |
| Lifetime Access | $24.99 | one-time |


### SQLPrep

[App page](https://appshunter.io/ios/app/sqlprep-learn-sql-and-practice/id6789642554)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Practice Library | $12.99 | one-time |


## Frequently asked questions

### Is D426 Mastery free?

D426 Mastery is free to download, with in-app purchases available.

### Is SQLPrep free?

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

### Do D426 Mastery or SQLPrep have ads?

Neither D426 Mastery nor SQLPrep 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.*