Listing details
HiCyou directory record
- Listed website
- producthunt.com
- Directory record created
- Nov 11, 2026
- Last record update
- Nov 11, 2026
Listing information
- Overview
- 5 key features
- 3 use cases
This page describes HiCyou's directory record. It is not a security, ownership, or product-quality certification.
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What is Opal Reader
Opal Reader is a PDF and EPUB reading app that places a notebook beside the page. On iPhone Duo, users can unfold to read their book and take notes side by side, then fold it closed to continue reading in a compact view with their place saved. The app is also available on iPhone and iPad.
Key Features
PDF and EPUB reading support
Side-by-side notebook next to the page
iPhone Duo support with unfold/fold reading modes
Saves your place in compact view
Available on iPhone and iPad
Use Cases
- Reading PDFs and EPUBs on iOS devices
- Taking notes while reading books or documents
- Studying or annotating documents on iPhone Duo
Why do startups need this tool?
Opal Reader combines reading and note-taking in one iOS app, making it a practical tool for founders and teams who read and annotate documents on the go.
