Opal Reader - Read PDFs and EPUBs on iPhone Duo

Happy to share Opal Reader with the Product Hunt community!

I like the simple idea behind this app: keeping your book and notes together instead of switching between screens.

The side-by-side reading experience on iPhone Duo is particularly interesting, while PDF annotations and EPUB support make it useful beyond one device.

Looking forward to seeing how the community responds and what Joginder builds next.

Congrats on the launch @jogindertanikella 👏

Hi Product Hunt 👋

I’m Joginder, the maker of Opal Reader.

When I first heard about iPhone Duo, one idea stuck with me: a book on one side, a place for your thoughts on the other. That became Opal Reader.

Who it’s for:

people who read PDFs and EPUBs and like to think on the page. Students, researchers, book lovers, anyone who highlights and then forgets why.

What it does:

📖 Reads PDFs and DRM-free EPUBs, with pages or continuous scroll

✍️ Highlight, underline, comment and draw on PDFs, then export them annotated

📓 Keeps a notebook beside your page on iPhone Duo, and in a sheet on compact screens

🔄 Fold it closed and keep reading, with your place saved

🎨 Three themes (Opal Light, Prism, Midnight), custom fonts and offline reading

Pricing:

Reading is free, and so are annotations on 3 documents. Pro removes that limit for a one-time $14.99 USD. No subscription, and existing annotations stay exportable.

Good to know:

Duo fold-aware layouts need iOS 27.1 or later. Protected retail books and library loans aren’t supported, only DRM-free files.

I’d love your feedback:

what would make Opal Reader the reader you reach for every day? And if you annotate PDFs, what’s the one thing you wish your current app did better?

Thanks for taking a look! ❤️