# WPACES vs : 528 AI — MCAT Study Engine

The clearest difference is update cadence: : 528 AI — MCAT Study Engine at every 4 days against WPACES's monthly. WPACES's advantage is iOS requirement (13.0 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.

WPACES ships an update monthly, : 528 AI — MCAT Study Engine every 4 days. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | WPACES | : 528 AI — MCAT Study Engine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Size | 71 MB | 36 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [West Philadelphia Achievement Charter Elementary School](https://appshunter.io/developer/1691116060) | [Abiy Selassie](https://appshunter.io/developer/1882640700) |

## What reviewers say

### WPACES

[App page](https://appshunter.io/ios/app/wpaces/id6449945899)

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

**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 WPACES free?

WPACES 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 WPACES or : 528 AI — MCAT Study Engine have ads?

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

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

WPACES ships an update monthly, and : 528 AI — MCAT Study Engine every 4 days. Most recently, WPACES was updated on October 2, 2026 and : 528 AI — MCAT Study Engine on October 7, 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.*