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.
Awesome work, Joginder. Congrats on launching! I'd like to clarify also, can a notebook entry link back to a specific passage? That would help with a long books especially.
I think the dual-screen reading experience makes a lot of sense here, especially when it comes from genuine curiosity about how people read and take notes. Love the idea. Congrats on the launch, Joginder.
“Highlight and then forget why” is very familiar. Having somewhere to write the thought beside the page makes sense. Congrats, Joginder!
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.
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! ❤️
About Opal Reader on Product Hunt
“Read PDFs and EPUBs on iPhone Duo”
Opal Reader launched on Product Hunt on November 10th, 2026 and earned 157 upvotes and 13 comments, placing #4 on the daily leaderboard. 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 was featured in iOS (111.1k followers), Productivity (665.2k followers) and Books (122.8k followers) on Product Hunt. Together, these topics include over 232.2k products, making this a competitive space to launch in.
Who hunted Opal Reader?
Opal Reader was hunted by Kate Ramakaieva. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Opal Reader stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Kate Ramakaieva
Awesome work, Joginder. Congrats on launching!
I'd like to clarify also, can a notebook entry link back to a specific passage? That would help with a long books especially.