Dramatically accelerate PDF study & research
Questions about your PDF, Answered by AI instantly.
Ask while you read, right where you are. Resolve every "I don't understand" in seconds.
Yomu is an iOS-only app that unifies a PDF reader, full-text search, and AI assistant in one place. No more switching to another app just to look something up.
- Explains complex passages in textbooks and papers in plain language
- Finds what you need across hundreds of thousands of characters instantly
- Smooth spread-view reader optimized for iPhone
Core features are free forever!
Experience
The reading experience Yomu delivers
From "just reading" to "deep understanding." Powerfully supports your learning and research.
- Explains complex passages in textbooks and papers in plain language
- Finds what you need across hundreds of thousands of characters instantly
- Smooth spread-view reader optimized for iPhone
Heavy textbooks, handled on iPhone alone
Automatically organizes your entire PDF library in-app. Access any document instantly wherever you are — transform spare moments into high-quality study time.
As intuitive as reading on paper
Smooth spread-view display makes long reading sessions completely stress-free. Freely switch between left-to-right and right-to-left layouts to perfectly match your preference.
Reach the information you need in an instant
Even in documents spanning hundreds of thousands of characters, full-text search completes at remarkable speed. Turn searching time into study time and dramatically boost research efficiency.
AI answers your questions, right where you are
"What does this term mean?" "Summarize the author's argument" — AI reads the exact context you're in and returns accurate, on-point explanations.
Surprisingly simple to use
No complicated setup required. Start a new reading experience in just 3 steps.
- STEP 1
Import your PDF files
Just share a PDF from the Files app or a browser. It's automatically organized into your dedicated library.
- STEP 2
App prepares automatically
Analysis completes in the background the moment you add a file. Full-text search and AI answers are ready immediately.
- STEP 3
Just ask, like speaking naturally
When something catches your attention while reading, ask out loud right then. Clear explanations come back like having a personal tutor.
Pricing Plans
Free Plan
Start immediately — no account required.
- PDF reading (unlimited)
- Full-text search (unlimited)
- AI questions (daily limit applies)
Pro Plan
Monthly or annual auto-renewing subscription.
- Virtually unlimited AI questions
- Priority access to high-quality models
- Purchase restoration supported
Billing and restoration are handled through the App Store. Pricing, billing, and cancellation follow App Store terms.
Frequently Asked Questions
Can I read scanned PDFs?
Yes. The OCR feature extracts text, so you can read, search, and ask AI questions even with scanned PDFs.
How many AI questions can I ask?
The free plan has a daily limit. The Pro plan is virtually unlimited. The limit resets automatically the next day.
Full-text search isn't working
The index is still being built right after you add a PDF. Please wait a moment and try again.
Is my data sent to a server?
When you ask an AI question, the current page content and recent conversation are sent to the server. The PDF file itself is stored on your device and is never sent externally.
Read deeper with Yomu.
Core features are free. Download and try it out.