PDFAuto vs Viewport
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
PDFAuto
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PDFAuto - Local PDF AI assistant Transform how you interact with PDFsβ100% locally on your device! PDFAuto uses advanced AI to analyze documents, answer questions, and unlock insights without uploading your files anywhere. Features: β’ AI-powered PDF analysis & comprehension β’ Real-time Q&A about your documents β’ Local processing for privacy protection β’ Support for all PDF formats From research papers to business reports, PDFAuto makes reading interactive. Download now and unlock intelligent document interaction!
Viewport
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Your HTML documents deserve a proper reader. Viewport opens .html and .htm files from Files and iCloud Drive on iPhone and iPad. Read reports, reference pages, and interactive documents with their original inline styles and JavaScript. READ AND INTERACT β’ Open HTML using the file picker or the systemβs Open In menu. β’ Keep interactive controls and responsive layouts in supported documents. β’ Hide the reading controls while scrolling and bring them back with a tap. β’ Search for text in the current document. KEEP USEFUL FILES CLOSE β’ Return to recently opened documents. β’ Keep a local reading copy of imported HTML. β’ Try the bundled interactive sample without an account. EXPORT AND SHARE β’ Create a PDF with the page as displayed. β’ Export an A4 PDF using the documentβs print layout. β’ Share the original HTML through the system share sheet. Self-contained HTML works best. Separate companion files are not imported automatically. Documents that load remote resources need an internet connection for those resources. PDF exports are static and do not preserve interactive controls. No account, advertising, or analytics SDKs. The developer does not collect your documents or reading history through the app. HTML you open can contact external services defined by its content; those services have their own privacy practices.
Screenshots
Verdict
PDFAuto and Viewport are too close to call on the numbers: across 5 compared parameters β price, ads, in-app purchases and device support among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | PDFAuto | Viewport |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 97 MB | 5 MB |
| Age rating | 4+ | 17+ |
| Developer | ζι ι» | YU CHEN WANG |
In-app purchases
PDFAuto
No in-app purchases
Viewport
No in-app purchases









