# Chat with PDF vs System Rx

The clearest difference is in-app purchases: System Rx at none against Chat with PDF's 4. Chat with PDF's advantage is update cadence (every 4 days vs every 3 weeks) and iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Chat with PDF sells 4 in-app purchases, starting at $4.99 per month. System Rx asks for nothing beyond the download.

Chat with PDF ships an update every 4 days, System Rx every 3 weeks. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Chat with PDF | System Rx |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Size | 28 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Fuad Hasanli](https://appshunter.io/developer/1856832329) | [Mohamed Saud](https://appshunter.io/developer/1797283594) |

## What reviewers say

### Chat with PDF

[App page](https://appshunter.io/ios/app/chat-with-pdf-docmind-ai/id6757693350)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $4.99 | per month |
| Pro+ Monthly | $9.99 | per month |
| Pro | $35.99 | per year |
| Pro+ Yearly | $71.99 | per year |


### System Rx

[App page](https://appshunter.io/ios/app/system-rx/id6761538119)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Chat with PDF free?

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

### Is System Rx free?

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

### Do Chat with PDF or System Rx have ads?

Neither Chat with PDF nor System Rx shows ads.

### Which is updated more often, Chat with PDF or System Rx?

Chat with PDF ships an update every 4 days, and System Rx every 3 weeks. Most recently, Chat with PDF was updated on October 16, 2026 and System Rx on October 11, 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.*