# Prep Vocab vs AJC

The clearest difference is ads: AJC at none against Prep Vocab's shown. AJC also leads on iOS requirement (13.0 vs 15.0). Prep Vocab's advantage is update cadence (every 8 days vs every 3 months). On price, 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.

Prep Vocab ships an update every 8 days, AJC every 3 months. The most recent releases landed on October 17, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Prep Vocab | AJC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 8 days** | Every 3 months |
| Size | 125 MB | 56 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PREP TECHNOLOGY JOINT STOCK COMPANY](https://appshunter.io/developer/1511769498) | [Minh Nguyen Ba](https://appshunter.io/developer/1549498900) |

## What reviewers say

### Prep Vocab

[App page](https://appshunter.io/ios/app/prep-vocab/id6762447531)

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

**In-app purchases:** none


### AJC

[App page](https://appshunter.io/ios/app/ajc-e/id6763201245)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prep Vocab free?

Prep Vocab is free to download, with no in-app purchases.

### Is AJC free?

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

### Do Prep Vocab or AJC have ads?

Prep Vocab shows ads; AJC does not.

### Which is updated more often, Prep Vocab or AJC?

Prep Vocab ships an update every 8 days, and AJC every 3 months. Most recently, Prep Vocab was updated on October 17, 2026 and AJC on October 23, 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.*