# PDF Studio vs AI Chat Assistant

The clearest difference is update cadence: AI Chat Assistant at every 3 days against PDF Studio's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Studio sells 3 in-app purchases, starting at $2.49 per 7 days and AI Chat Assistant sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDF Studio ships an update every 2 weeks, AI Chat Assistant every 3 days. The most recent releases landed on June 9, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | PDF Studio | AI Chat Assistant |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 6 MB | 26 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Boris Spiro](https://appshunter.io/developer/1853293003) | [Solid Apps LLC](https://appshunter.io/developer/6779157605) |

## What reviewers say

### PDF Studio

[App page](https://appshunter.io/ios/app/pdf-studio-scan-and-edit-docs/id6755344174)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $2.49 | per 7 days |
| Monthly Premium | $4.99 | per month |
| Annual Premium | $29.99 | per year |


### AI Chat Assistant

[App page](https://appshunter.io/ios/app/ai-chat-assistant-chatbot-50/id6763554618)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $6.99 | per 7 days |
| Premium | $9.99 | per 7 days |
| Premium | $49.99 | per year |


## Frequently asked questions

### Is PDF Studio free?

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

### Is AI Chat Assistant free?

AI Chat Assistant is free to download, with in-app purchases available.

### Do PDF Studio or AI Chat Assistant have ads?

Neither PDF Studio nor AI Chat Assistant shows ads.

### Which is updated more often, PDF Studio or AI Chat Assistant?

PDF Studio ships an update every 2 weeks, and AI Chat Assistant every 3 days. Most recently, PDF Studio was updated on June 9, 2026 and AI Chat Assistant on September 17, 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.*