# : 528 AI — MCAT Study Engine vs ScrollCAT

The clearest difference is in-app purchases: : 528 AI — MCAT Study Engine at none against ScrollCAT's 1. : 528 AI — MCAT Study Engine also leads on update cadence (every 4 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ScrollCAT sells 1 in-app purchase, starting at $5.99 per month. : 528 AI — MCAT Study Engine asks for nothing beyond the download.

: 528 AI — MCAT Study Engine ships an update every 4 days, ScrollCAT fortnightly. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | : 528 AI — MCAT Study Engine | ScrollCAT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 36 MB | 63 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Abiy Selassie](https://appshunter.io/developer/1882640700) | [Saar Gold](https://appshunter.io/developer/6772611819) |

## What reviewers say

### : 528 AI — MCAT Study Engine

[App page](https://appshunter.io/ios/app/528-ai-mcat-study-engine/id6760100060)

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

**In-app purchases:** none


### ScrollCAT

[App page](https://appshunter.io/ios/app/scrollcat-mcat-prep/id6772611817)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coached Mode | $5.99 | per month |


## Frequently asked questions

### Is : 528 AI — MCAT Study Engine free?

: 528 AI — MCAT Study Engine is free to download, with no in-app purchases.

### Is ScrollCAT free?

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

### Do : 528 AI — MCAT Study Engine or ScrollCAT have ads?

Neither : 528 AI — MCAT Study Engine nor ScrollCAT shows ads.

### Which is updated more often, : 528 AI — MCAT Study Engine or ScrollCAT?

: 528 AI — MCAT Study Engine ships an update every 4 days, and ScrollCAT fortnightly. Most recently, : 528 AI — MCAT Study Engine was updated on October 7, 2026 and ScrollCAT on October 5, 2026.

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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.*