PDF AI vs PDF Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF AI
This application offers a comprehensive suite of AI-powered tools for managing PDF documents. Users can edit text and images, generate AI summaries, convert files to various formats, and securely sign documents. It prioritizes speed and privacy with local processing and encryption.
- Edit PDF text and images
- AI-powered summaries and highlights
- Annotate and collaborate on documents
- Fill and e-sign forms
- Convert PDFs to Word, Excel, PPT, Images, TXT
- Secure offline scanning and organization
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AI-powered PDF toolkit built for speed, security, and clarity. Chat with PDFs, summarize long documents, generate slides, create podcast-style audio, scan, edit, convert, sign, and collaborate—without friction. What you can do • Chat with PDFs: Ask questions and get instant answers from documents. • Summarize smarter: Turn long PDFs, reports, papers, and books into clear key points. • Generate with AI: Create slides, podcast-style audio, visual digests, and insight cards from documents. • Edit PDFs: Modify text, images, and layout with precision. • Read smarter: AI summaries, highlights, bookmarks, day/night/Sepia. • Annotate & collaborate: Highlight, underline, notes, sketches, comments, and share. • Fill & sign: Complete interactive forms and e‑sign on the go. • Convert fast: PDF ⇄ Word/Excel/PPT/Images/TXT with high fidelity. • Scan & organize: Scan documents, extract text with OCR, search, manage, and work offline securely. Why it’s better • AI tools for reading, understanding, presenting, and listening to documents. • Lightning-fast viewer for large PDFs. • Privacy-first: local processing and strong encryption. • Professional output, zero watermarks for subscribers. • Continuous updates with new AI capabilities. VIP (auto‑renewable subscriptions) • Monthly or yearly plans available. • Unlock premium tools: advanced editing, full‑text search, batch processing, high‑quality exports, AI summaries, AI chat, AI slides, podcast-style audio, visual digests, OCR, conversion tools, and more. Policies • Privacy: https://sophoninc.com/privacy.html • Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Terms of Service: https://sophoninc.com/terms.html Contact • Email: feedback@sophoninc.com
PDF Reader
This app is a fast and lightweight document viewer for PDF, Word, Excel, and PowerPoint files. It offers smart file management, offline access, and easy sharing, making it ideal for students and professionals. Enjoy a seamless reading experience with features like search, bookmarks, and dark mode.
- All-in-one document viewer (PDF, DOCX, XLSX, PPTX, TXT)
- Smart file manager
- Offline document access
- Fast and smooth performance
- Search and bookmarking
- Dark mode support
- Easy document sharing
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PDF Reader - Smart Reader is a fast, lightweight, and powerful document viewer that allows you to read PDF, Word, Excel, and PowerPoint files all in one place. Designed for efficiency, it helps you manage and view your documents seamlessly without needing an internet connection. Key Features: All-in-One Viewer: Open and read PDF, DOCX, XLSX, PPTX, and TXT files instantly. Smart File Manager: Automatically scans and organizes all documents stored on your device. Fast & Smooth: Optimized for large files, ensuring quick page loading and smooth scrolling. Privacy Focused: Your documents remain on your device. We process everything locally and never upload your files to any server. Search & Bookmark: Easily find your documents with a powerful search tool and save important pages for later. Dark Mode Support: Comfortable reading experience in any lighting condition. Share Easily: Share your documents via email or social media with just one tap. Whether you are a student or a professional, PDF Reader - Smart Reader is the perfect tool for your daily document needs. Download now and simplify your digital life!
Screenshots
Verdict
The clearest difference is rating: PDF AI at 4.8 against PDF Reader's 4.0. PDF AI also leads on review sentiment (90% vs 50%) and ratings volume (151 vs 4). PDF Reader's advantage is update cadence (every 4 days vs every 3 weeks) and monetization model (ad-supported vs free with in-app purchases). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. PDF AI sells 5 in-app purchases, starting at $7.99 per 7 days and PDF Reader sells 1 in-app purchase, starting at $19.99 per 7 days. Whichever you choose, the download price is not the number that matters.
PDF AI holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: PDF AI has 151 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 90% of PDF AI's written reviews are positive against 50% of PDF Reader's.
PDF AI ships an update every 3 weeks, PDF Reader every 4 days. The most recent releases landed on September 20, 2026 and September 23, 2026 respectively.
| Parameter | PDF AI | PDF Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (151 ratings) — better | 4.0 (4 ratings) |
| Positive reviews | 90.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 151 — better | 4 |
| Update frequency | Every 3 weeks | Every 4 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 169 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Yang Yang | truong nguyen xuan |
Customer experience
PDF AI
PDF Reader
In-app purchases
PDF AI
- Weekly VIP$7.997 Days
- Weekly VIP$9.997 Days
- Weekly VIP3 Days trial$9.997 Days
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- Monthly VIP3 Days trial$14.991 Month
- Yearly VIP3 Days trial$59.991 Year
PDF Reader
- Premium Subscription - 1 week$19.997 Days
