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Your lecture photos
become your notebook.

Your photos organized,
your notes ready to study.

Choose your course and upload your photos. Your sources collect in one notebook. Notes with AI and transcripts are available when those services are on.

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My biology notebook
YOUR LECTURE PHOTOS
Biology · Oct 8

Photosynthesis

Energy from the sun ☀light + water + carbon dioxide
3 photos
BIOLOGY Saved

Inside a leaf,
a whole world.

Photosynthesis is the process that turns light energy into chemical energy.

6CO₂ + 6H₂O light → C₆H₁₂O₆ + 6O₂

01   Light-dependent reactions

They happen in the thylakoid membranes of the chloroplast. Light energy is used to make ATP and NADPH; splitting water releases oxygen.

02   The Calvin cycle

It happens in the stroma. Using ATP and NADPH, carbon dioxide is fixed into organic molecules.

Source: Lecture photo 1
Every new lecture, a new page.
Scattered files A living notebook that’s yours

Get more out of your lectures.

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01
BiologyMy lecture notebook

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Open a separate notebook for each course.
Everything has its place from the start.

02
Drop your photos here
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Upload your photos.

Add a photo of the board or the lecture PDF.
With AI on, create notes from your sources.

03
Added to your notebookPhotosynthesis

Keep your notebook going.

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Next lecture, grow it from where you left off.

Study plan

Always know
where you left off.

See the topics in your notebook together. Pick the topic to study, open its note and mark it when you’re done. Go at your own pace.

Biology study plan1 / 4 topics
Energy conversion in living things
ATP and energyDone
PhotosynthesisStudying now
Chemosynthesis
Cellular respiration
Your topics are linked to the notes in your notebook.
BIOLOGY / LECTURE 04

A good note is in the details.

Definition, connection, formula, example.
So you can understand the topic again.

The source is always one click away.
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Your way.

Keep the lecture’s details
in your notes.

Don’t lose where a formula came from or what a concept means. Open notes linked to their sources, add your own words and organize your notebook your way.

  • Headings, explanations and examples together
  • Easy access to the original photos and PDFs
  • Autosave for the notes you edit
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Frequently asked
questions.

Every question has an answer. Here’s what to know about your lecture notebook, sources and recordings.

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Is AI free to use?

Every account with a verified email has free weekly AI use; it shows as a percentage and renews 7 days after your first AI job. For more, upgrade to Notju Pro in the iPhone and iPad app: 5× the Free plan’s AI use and 2 GB of file storage. Saving sources, writing notes yourself and the study plan are free on both plans and don’t count toward AI use.

Which files can I upload?

You can upload lecture photos and PDF files. Choose several photos of one lecture together and put them in order before creating a note.

Can I edit notes later?

Yes. You can edit the title and content of the notes in your notebook. Your changes are saved automatically, and you can go back to the source from the same screen.

What happens to my old notes when I add new photos?

Your new upload is added to the notebook as a new part. Your earlier notes and your own edits are kept, so your notebook grows with every lecture.

Are my original files kept too?

Yes. The source files you upload and your notes are kept with your account. You can open and download the original photo or PDF from the course’s Sources.

How does lecture recording work?

Choose your course and allow the microphone to start recording. You can pause, finish and listen again. When transcripts and notes are available, they’re added to the same notebook. Get consent from the lecturer and others before you record.

What data does the AI use?

For reading photos and PDFs and writing notes, the sources you choose are sent to our AI provider, Anthropic (Claude); for transcripts, audio parts are sent to our transcription provider, Groq. The permission screen shows the providers before a job starts. Only saving files doesn’t start AI. Compare AI results with their sources. See our Privacy page for details.