# PDFAuto vs Viewport

PDFAuto and Viewport are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | PDFAuto | Viewport |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 97 MB | 5 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [敏锋 黄](https://appshunter.io/developer/1645527564) | [YU CHEN WANG](https://appshunter.io/developer/6813696685) |

## What reviewers say

### PDFAuto

[App page](https://appshunter.io/ios/app/pdfauto-local-pdf-ai-assistant/id6778434973)

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

**In-app purchases:** none


### Viewport

[App page](https://appshunter.io/ios/app/viewport-html-reader/id6813696683)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDFAuto free?

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

### Is Viewport free?

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

### Do PDFAuto or Viewport have ads?

Neither PDFAuto nor Viewport shows ads.

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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.*