# PDF Master vs AI聊天键盘

The clearest difference is update cadence: AI聊天键盘 at weekly against PDF Master's every 2 months. PDF Master's advantage is iOS requirement (11.0 vs 13). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Master sells 13 in-app purchases, starting at $2.99 per 7 days and AI聊天键盘 sells 5 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDF Master ships an update every 2 months, AI聊天键盘 weekly. The most recent releases landed on June 3, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | PDF Master | AI聊天键盘 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/pdf-master-editor-and-scanner/id1606486950/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 60 MB |
| Requires iOS | **11.0** | 13 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Beijing palm shell Network Technology Co., Ltd](https://appshunter.io/developer/1573900492) | [Syn-Tech Ltd.](https://appshunter.io/developer/1712457043) |

## What reviewers say

### PDF Master

[App page](https://appshunter.io/ios/app/pdf-master-editor-and-scanner/id1606486950)

This app is a comprehensive PDF tool for iPhone and iPad users. It offers editing, conversion, scanning, reading, and signing capabilities in a single, user-friendly interface. Streamline your document management for work, study, or daily tasks.

**Highlights:** Professional PDF editing and annotation, Convert PDFs to/from Word, Excel, PPT, Images, TXT, HD mobile scanner with OCR, Image to PDF conversion, Smooth PDF reader and file manager, Electronic and handwritten signatures

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Converter Premium Weekly | $2.99 | per 7 days |
| PDF Converter Premium Monthly | $3.99 | per month |
| PDF Converter Premium quarter | $4.99 | per 3 months |
| PDF Photos Premium Monthly | $4.99 | per month |
| PDF Converter Premium Yearly | $9.99 | per year |
| PDF Photos Premium Quarterly | $9.99 | per 6 months |
| PDF Photos Premium Yearly | $9.99 | per year |
| PDF Photos Premium Yearly | $12.99 | per year |
| PDF Photos Premium Yearly | $19.99 | per year |
| PDF Converter Premium Yearly | $25.99 | per year |
| PDF Converter Premium Lifetime | $14.99 | one-time |
| PDF Converter Premium Lifetime | $19.99 | one-time |
| PDF Converter Premium Lifetime | $29.99 | one-time |


### AI聊天键盘

[App page](https://appshunter.io/ios/app/ai/id6748904379)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续订阅周会员 | $6.99 | per 7 days |
| 连续订阅月会员 | $9.99 | per month |
| 连续订阅季会员 | $14.99 | per 3 months |
| 买一年送一年会员权益 | $14.99 | one-time |
| 永久会员权益 | $19.99 | one-time |


## Frequently asked questions

### Is PDF Master free?

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

### Is AI聊天键盘 free?

AI聊天键盘 is free to download, with in-app purchases available.

### Do PDF Master or AI聊天键盘 have ads?

Neither PDF Master nor AI聊天键盘 shows ads.

### Which is updated more often, PDF Master or AI聊天键盘?

PDF Master ships an update every 2 months, and AI聊天键盘 weekly. Most recently, PDF Master was updated on June 3, 2026 and AI聊天键盘 on September 8, 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.*