iPad + Android e-ink
Private betaKeep the note with the passage.
Lumen is an EPUB reader for people who think with a pencil in hand. Readers can highlight a passage, write a note with a stylus, and move between the thought and its source.
A handwritten note stays attached to the passage that inspired it.
Readers can move from passage to note and from note back to passage.
The library, reading position, highlights, and notes continue across supported devices.
The product problem
Digital reading and handwriting often happen in separate apps. The note survives, but the sentence, argument, or image that prompted it becomes harder to recover.
Lumen treats the link as part of the note. A reader can write freely, then return to the exact place in the book without searching through highlights or page numbers.
The experience
A marker in the book opens the related notebook page. The notebook can return the reader to the passage. That small loop changes the product from a reader beside a notebook into one connected thinking space.
Continuity
Readers move between rooms, screens, and stretches of time. Lumen keeps the library, reading state, highlights, and notes together so the next session begins with the context of the last one.