Launching today

Opal Reader

Launching today

Read PDFs and EPUBs on iPhone Duo

25 followers

Read PDFs and EPUBs on iPhone Duo

25 followers

Visit website

Note and writing apps

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Knowledge base software

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PDF Editor

Opal Reader is a PDF and EPUB reader with a notebook beside the page. On iPhone Duo, unfold to read your book and your notes together, then fold it closed and keep reading in a compact view with your place saved. Also available on iPhone and iPad.

Opal Reader Alternatives

Looking beyond Opal Reader for iPhone Duo? Try Bear for elegant Markdown notes, Readwise to resurface highlights, and Matter for a refined read‑it‑later flow. For heavy PDFs, Desklamp brings collaborative annotations, while Glasp helps capture and share quotes across devices.