# PrepAiro GRE vs Vocabulary Builder Mastery

The clearest difference is in-app purchases: PrepAiro GRE at none against Vocabulary Builder Mastery's 1. PrepAiro GRE also leads on iOS requirement (13.0 vs 26.5). On price, ads and device support there is nothing between them.

Both are free to download. Vocabulary Builder Mastery sells 1 one-off in-app purchase. PrepAiro GRE asks for nothing beyond the download.

## The numbers

| Metric | PrepAiro GRE | Vocabulary Builder Mastery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 6 weeks |
| Size | 145 MB | 3 MB |
| Requires iOS | **13.0** | 26.5 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [PrepAIro](https://appshunter.io/developer/1795391659) | [Farid Ahmad](https://appshunter.io/developer/599405155) |

## What reviewers say

### PrepAiro GRE

[App page](https://appshunter.io/ios/app/prepairo-gre/id6757590892)

**In-app purchases:** none


### Vocabulary Builder Mastery

[App page](https://appshunter.io/ios/app/vocabulary-builder-mastery/id6776732039)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vocabulary Pro | $2.99 | one-time |


## Frequently asked questions

### Is PrepAiro GRE free?

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

### Is Vocabulary Builder Mastery free?

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

### Do PrepAiro GRE or Vocabulary Builder Mastery have ads?

Neither PrepAiro GRE nor Vocabulary Builder Mastery shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*