# MCAT Biochem vs : 528 AI — MCAT Study Engine

The clearest difference is update cadence: : 528 AI — MCAT Study Engine at every 4 days against MCAT Biochem's every 3 months. MCAT Biochem's advantage is iOS requirement (10.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MCAT Biochem ships an update every 3 months, : 528 AI — MCAT Study Engine every 4 days. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | MCAT Biochem | : 528 AI — MCAT Study Engine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Size | 7 MB | 36 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Ruveneco Incorporated](https://appshunter.io/developer/843185259) | [Abiy Selassie](https://appshunter.io/developer/1882640700) |

## What reviewers say

### MCAT Biochem

[App page](https://appshunter.io/ios/app/mcat-biochem/id1077668565)

**Features:** macOS Compatibility

**In-app purchases:** none


### : 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


## Frequently asked questions

### Is MCAT Biochem free?

MCAT Biochem is free to download, with no in-app purchases.

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

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

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

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

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

MCAT Biochem ships an update every 3 months, and : 528 AI — MCAT Study Engine every 4 days. Most recently, MCAT Biochem was updated on November 2, 2026 and : 528 AI — MCAT Study Engine on October 25, 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.*