# PDF Mpjex vs KeyMemo

The clearest difference is ads: KeyMemo at none against PDF Mpjex's shown. KeyMemo also leads on update cadence (daily vs every 6 weeks). PDF Mpjex's advantage is iOS requirement (15.0 vs 17). On price, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Mpjex sells 3 in-app purchases, starting at $0.99 per month and KeyMemo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PDF Mpjex ships an update every 6 weeks, KeyMemo daily. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PDF Mpjex | KeyMemo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (324 ratings)](https://appshunter.io/ios/app/pdf-mpjex-editor-for-pdf/id6450148824/reviews)** | — |
| Number of ratings | **324** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 12 MB |
| Requires iOS | **15.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Beijing Yima Network Technology Co., Ltd.](https://appshunter.io/developer/1655494126) | [超 刘](https://appshunter.io/developer/1812913202) |

## What reviewers say

### PDF Mpjex

[App page](https://appshunter.io/ios/app/pdf-mpjex-editor-for-pdf/id6450148824)

This app allows you to create and edit PDF documents on your iPhone and iPad. Features include scanning, merging, reordering, and protecting PDFs with passwords. You can also extract pages, images, and text from existing documents.

**Highlights:** Scan documents, Create PDF from photos/web, Merge and extract PDFs, Delete, rotate, reorder pages, Password protect PDFs, Extract images and pages

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Editor & Maker Pro Monthly | $0.99 | per month |
| PDF Editor & Maker Pro Yearly | $9.99 | per year |
| PDF Editor & Maker Pro | $4.99 | one-time |

**What reviewers like**

- 👍 Amazing app with many tools
- 👍 Nice app
- 👍 Good app
- 👍 Very good
- 👍 Nice app

**Reported bugs**

- 🐛 App crashes when viewing drawings

**Requested features**

- 💡 Add automatic table of contents generation
- 💡 Ability to scan up to 24 pages at once, then merge


### KeyMemo

[App page](https://appshunter.io/ios/app/keymemo/id6768071867)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KeyMemo Premium | $2.99 | one-time |


## Frequently asked questions

### Is PDF Mpjex free?

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

### Is KeyMemo free?

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

### Do PDF Mpjex or KeyMemo have ads?

PDF Mpjex shows ads; KeyMemo does not.

### Which is updated more often, PDF Mpjex or KeyMemo?

PDF Mpjex ships an update every 6 weeks, and KeyMemo daily. Most recently, PDF Mpjex was updated on October 27, 2026 and KeyMemo on October 24, 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.*