# Whio: EPUB & PDF Reader — user reviews

> 2 indexed App Store user reviews of Whio by Nil Coalescing Limited, rated 5.00/5 from 1 ratings.

- Source: https://appshunter.io/ios/app/whio-epub-and-pdf-reader/id6813818431/reviews
- App overview in markdown: https://appshunter.io/ios/app/whio-epub-and-pdf-reader/id6813818431.md

## Is Whio safe?

Not enough ratings yet to assess Whio.

## Is Whio legit?

Whio: EPUB & PDF Reader appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Whio is 70 out of 100 points across 7 verification signals from App Store and developer data.

## Most critical reviews (2 lowest-rated)

### 4/5 — Good App. Doesn’t Render Syntax Highlighting Consistently Though

*2026-10-26*

It’s a great app for reading technical books. The ability to scroll instead of turn pages is much better when dealing with code. My only issue was that not every book rendered code with syntax highlighting. Mohammed Azam’s “SwiftUI Architecture” and “SwiftData Architecture” didn’t show any syntax highlighting. It was still better to read in Whio than Books because of the scrolling and the fact that the code word wraps instead of being cut off on the right.

**Developer response:** Thank you so much for your kind feedback! I'm really glad you're enjoying reading technical books in Whio.

Version 1.0.1 has just been released with improvements to code recognition and language detection, so syntax highlighting should now work in more books. I'll keep working on improving this further to support even more books and languages.

Thanks again for taking the time to share your experience. I really appreciate it!

### 5/5 — Absolute genius of an app

*2026-10-25*

Written by a techie for techies, this is what Apple Books should do with technical books. Makes code easy to see and extract. Also gathers your highlighted text in a notebook so you can see what you regard as important - you could easily highlight often used code to make it easy to refer back to. Well worth upgrading to Unlimited!

**Developer response:** Thank you so much for such a lovely review! I'm really happy to hear you're enjoying Whio and finding the code features and highlights useful. It's exactly what I hoped to make easier when building the app. Thanks again for your support!

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-06.*