Annotate PDFs
Draw, highlight and write on the pages of your book, then export the annotated pages as a new PDF.
Read, annotate and revise your books in one place
Upload a PDF, annotate it page by page, translate the words you select, and review them later as flashcards.
Als Gregor Samsa eines Morgens erwachte …
Translation
die Verwandlung
the transformation
Saved to vocabulary
Due today
die Verwandlung
Interval 6 days
What you can do
Every part of the study loop is linked to the book you are reading.
AI chat on the page
Ask questions about the page you are reading, annotations included, without leaving the reader.
Translate while reading
Select a word or phrase to translate it into your app language and save it to the vocabulary set of that book.
Spaced repetition
SM-2 flashcards grouped by book or custom set, with generated images and audio. Bulk import from documents.
Sync and OCR
Each book stores its last page, and OCR text from scanned pages is kept with it, on every device.
Progress tracking
A dashboard with your streak, the cards due today and daily progress, plus a study calendar you can share.
Organised by subject
Sort your library by subject and keep each book's notes, vocabulary and progress together.
- Vocabulary exercises generated from your books
- Shareable study calendar and review history
- Textbook or story mode for every upload
- Mathematics
- Physics
- Chemistry
- Biology
- History
- Literature
- Computer Science
- Economics
- Philosophy
- Languages
Common questions
Do I need to install anything?
No. Study Assistant runs in the browser and can be installed from it as an app on a laptop, tablet or phone.
What can I upload?
PDF books, marked as a textbook or a story. Scanned pages are run through OCR and the result is stored with the book, so the text stays selectable and translatable.
Which languages are supported?
The interface is available in English, German and Chinese. Text you select in a book is translated into the language you are using.
Start your next study session
Create an account and upload your first book. Free to start.