Keep context intact
The source never disappears behind a translated replacement.
Scroll-synced translation
Translate lecture PDFs side by side on iPad.
Read the source and translation together as you scroll. When a lecture stops making sense, annotate the page or circle the passage and ask your AI tutor — without leaving the PDF.
Free to download · Pro US$8.99/month · iPhone, iPad & Mac
Stay aligned while scrolling
Follow the same part of the lecture in both languages.
Write and ask in place
Annotate or ask the AI tutor without switching apps.
Made for real coursework
A translator that stays inside your study flow.
Translation is useful only if it helps you keep reading, writing, and understanding the same document.
01 · Read
Keep the original and translation aligned as you scroll.
BBNotes follows your position in the lecture PDF and keeps the translated passage beside it, even during fast scrolling. You can check terminology against the source instead of trusting a disconnected block of translated text.
02 · Annotate
Write on the PDF without leaving your notebook.
Highlight a phrase, handwrite an explanation, or save a new term to your word book. Your notes remain attached to the course material instead of living in a separate translation app.
03 · Understand
Ask the page when a lecture stops making sense.
Circle the passage and ask the built-in AI tutor. It already has the document context, so you do not need to copy the paragraph, describe the page, or retype a formula.
One continuous workspace
Translation app versus a study notebook that translates.
BBNotes keeps the source, your thinking, and the next question in the same place.
Task
Typical workflow
BBNotes
Read
Replace or copy the source text
Source and translation together
Annotate
Switch back to a PDF or notes app
Handwrite on the same document
Ask
Paste context into a chatbot
Circle the page and ask in place
Review
Search across separate app histories
Questions stay anchored to the PDF
PDF translation questions
What students ask first.
What is side-by-side PDF translation?
BBNotes places the source PDF and its translation next to each other so you can follow both versions while reading.
Does the translation stay aligned as I scroll?
Yes. BBNotes tracks the page as you move and keeps the translated passage beside the source, including during fast scrolling.
Can I annotate the PDF by hand?
Yes. BBNotes is a full study notebook, so you can handwrite, highlight, and organise notes directly on your material.
Can I ask questions about the PDF?
Yes. Circle the part you do not understand and ask the built-in AI tutor without retyping the passage or formula.
Who is this feature for?
It is built especially for international students reading lecture slides, papers, and course PDFs in a second language.
How much does BBNotes cost?
BBNotes is free to download. Pro is US$8.99 per month.