Students read thousands of pages of PDFs — textbooks, research papers, lecture slides. The right PDF reader can turn passive reading into active studying. The wrong one is just a viewer.
Here’s how the best options compare.
Comparison Table
| Tool | Platform | Annotation | AI Summary | Flashcards from PDF | Highlights | Price |
|---|---|---|---|---|---|---|
| Duetoday | Web, iOS, Android | Basic | ✅ | ✅ Auto-gen | ✅ | Free / $9mo |
| Adobe Acrobat | All | Best-in-class | ✅ (AI Assistant) | ❌ | ✅ | $19.99/mo |
| GoodNotes | iPad/iOS | Handwriting | ❌ | ❌ | ✅ | $9.99/yr |
| Notability | iPad/iOS | Handwriting | ❌ | ❌ | ✅ | $11.99/yr |
| Foxit PDF | All | ✅ Good | ❌ | ❌ | ✅ | Free / $6.99mo |
| Preview (Mac) | Mac | Basic | ❌ | ❌ | ✅ | Free |
| Zotero | All | Basic | ❌ | ❌ | ✅ | Free |
| Elicit | Web | ❌ | ✅ Papers | ❌ | ❌ | Free / $12mo |
| PDF Expert | iOS/Mac | ✅ Good | ❌ | ❌ | ✅ | $79.99/yr |
What Makes a Good Student PDF Reader?
There are two types of student PDF workflows:
1. Active reading — annotation, highlighting, commenting as you read 2. Study extraction — turning the PDF into flashcards, summaries, or study notes
Most PDF readers only handle the first. Duetoday handles both.
1. Duetoday — Best for Studying From PDFs
Duetoday isn’t a traditional PDF reader — it’s a study tool that happens to read PDFs brilliantly. Upload any PDF and within seconds you can:
- Get an AI summary of the entire document
- Ask questions about specific sections (“What does Chapter 3 say about mitosis?”)
- Generate flashcards from the key concepts automatically
- Create a quiz based on the PDF content
What it doesn’t have:
- Traditional annotation tools (highlighting, pen marks on the PDF itself)
- The visual PDF layer that apps like GoodNotes provide
Best for: Students who want to study the content, not just annotate it.
2. Adobe Acrobat — Best Full-Featured PDF Tool
Adobe Acrobat is the industry standard for a reason. It has every annotation feature imaginable, excellent form filling, document editing, and now an AI Assistant that answers questions about your PDFs.
Why students don’t use it:
- $19.99/mo is expensive for a student
- It’s overkill for just reading textbooks
- The AI features are good but not study-specific
Where it shines:
- Advanced annotation (comments, stamps, shapes)
- Editing PDFs (changing text, rearranging pages)
- Accessibility features
- Professional/workplace environments
Honest verdict: Unless your school provides it free (many do through Adobe’s education program), Acrobat is too expensive for casual student use.
3. GoodNotes 6 — Best for Handwriting on PDFs
GoodNotes is excellent if you have an iPad and Apple Pencil and want to annotate PDFs by hand. Write notes in the margins, draw diagrams, highlight with a stylus. It feels like writing on paper.
Pricing:
| Plan | Price |
|---|---|
| Free | 3 notebooks |
| GoodNotes 6 | $9.99/yr |
Best for: Visual learners with an iPad who prefer handwriting.
4. Notability — Best for Audio-Synced PDF Annotation
Notability’s unique feature: it records audio while you annotate. Tap any word you wrote and hear the audio from that exact moment. This is extremely useful for annotating lecture slides while recording the lecture.
Better than GoodNotes for: Audio-synced annotations Worse than GoodNotes for: PDF organization and interface polish
5. Foxit PDF Reader — Best Free Desktop PDF Reader
Foxit is a fast, free PDF reader with solid annotation features. It handles large files well, doesn’t crash, and is much less bloated than Adobe Reader. If you just need to read and highlight PDFs on a laptop without paying, Foxit is a great choice.
No AI, no flashcards — but excellent for basic reading workflow.
6. PDF Expert — Best for Apple Users (Not iPad-Only)
PDF Expert (by Readdle) is a polished PDF tool for Mac and iOS. Clean interface, great annotation, good sync between iPhone/iPad/Mac. Better than GoodNotes/Notability if you want proper desktop + mobile support.
Pricing:
| Plan | Price |
|---|---|
| Free | Limited editing |
| PDF Expert | $79.99/yr (all devices) |
7. Zotero — Best for Research Students
Zotero is a reference manager with a solid built-in PDF reader. It automatically organizes your research papers by citation, lets you annotate inside the app, and syncs across devices.
If you’re doing a thesis or literature review and managing dozens of papers, Zotero is essential.
Feature Breakdown: Annotation Tools
| Feature | Duetoday | Adobe | GoodNotes | Foxit |
|---|---|---|---|---|
| Highlight | ✅ | ✅ | ✅ | ✅ |
| Text notes/comments | Basic | ✅ | ✅ | ✅ |
| Handwriting | ❌ | ✅ | ✅ Best | ❌ |
| AI Q&A | ✅ | ✅ | ❌ | ❌ |
| Generate flashcards | ✅ | ❌ | ❌ | ❌ |
| Summarize document | ✅ | ✅ (paid) | ❌ | ❌ |
| Search text | ✅ | ✅ | ✅ | ✅ |
Which PDF Reader Should You Use?
| Situation | Recommendation |
|---|---|
| Want AI to summarize and create flashcards | Duetoday |
| iPad + Apple Pencil, want to handwrite | GoodNotes or Notability |
| Need advanced editing and annotation | Adobe Acrobat (check if school provides) |
| Just want free, reliable desktop reader | Foxit or Preview (Mac) |
| Managing research papers/citations | Zotero |
| Apple ecosystem, want desktop + mobile | PDF Expert |
The Bottom Line
For most students, the best PDF reader is the one that helps you learn from the PDF — not just view it.
Duetoday is the only tool that actively converts your reading into a study session. For students, that’s the more important capability.
