Leviathan vs Whio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Leviathan
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LEVIATHAN: an interactive comic by Jason Shiga A seaside village – and a monstrous threat. Explore as you choose, by day or by night. Can you unravel the secrets of history and defeat the Leviathan? LEVIATHAN is not an ordinary comic. YOU make the choices that determine how the story unfolds. LEVIATHAN splits off into hundreds of different adventures. - A thrilling adventure of monsters, myths, and magic on the high seas (and the islands in between them). - Completely redesigned by the author for an infinite scrollable canvas. - Full audio accessibility with VoiceOver; every panel and choice can be spoken.
Whio
This app is designed for reading technical books and code on iOS devices. It offers specialized features for code readability, customizable text and code styling, and helpful reading aids. Users can also highlight, take notes, and export their saved content.
- Code syntax highlighting
- Independent text and code styling
- Customizable themes
- Reading aids (letter distinction, guide, focus window)
- Highlighting and note-taking
- Export saved content
- Import DRM-free EPUBs and PDFs
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Whio is an EPUB and PDF reader for technical books on iPhone and iPad, with a focus on readability and accessibility. Technical books are full of code, and most readers aren't built for it. Whio keeps code examples readable, with clear syntax highlighting, preserved indentation and horizontal scrolling for long lines. You can zoom into a single example to look at it closely, or copy it to try it yourself. CUSTOMIZE TEXT AND CODE SEPARATELY Set the typography for prose and for code independently, so each one reads the way you prefer. THEMES FOR YOUR READING NEEDS Choose from high-contrast themes, softer contrast and tinted backgrounds, each available in light and dark versions. EXTRA SUPPORT AS YOU READ Enable optional reading aids if needed. Letter distinction gives letters more definition, so similar letters are easier to tell apart. A reading guide helps you keep your place on the page, and a focus window dims the text around the lines you're reading. YOUR NOTEBOOK Highlight passages, add notes and bookmarks, and find them again with search. You can export everything you've saved. Whio comes with its own collection of original technical books you can read in full for free, and every reading feature is included. Import your own DRM-free EPUBs and PDFs and read a short free preview of each one. Upgrade to Whio Unlimited to read every book you import in full, with a subscription or a one-time purchase. The app and all in-app purchases are licensed under the standard Apple terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is price: Whio at Free against Leviathan's $3.99. Whio also leads on update cadence (every 10 days vs every 12 months). Leviathan's advantage is in-app purchases (none vs 3) and iOS requirement (17.6 vs 26.0). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Whio is free to download; Leviathan costs $3.99 up front. Whio sells 3 in-app purchases, starting at $0.99 per 7 days. Leviathan asks for nothing beyond the download.
Leviathan ships an update every 12 months, Whio every 10 days. The most recent releases landed on October 29, 2026 and November 6, 2026 respectively.
| Parameter | Leviathan | Whio |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 12 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 50 MB | 42 MB |
| Age rating | 12+ | 4+ |
| Developer | Zarfhome Software Consulting | Nil Coalescing Limited |
In-app purchases
Leviathan
No in-app purchases
Whio
- Unlimited3 Days trial$0.997 Days
- Unlimited3 Days trial$24.991 Year
- Lifetime Unlimited$49.99









