Comparison

Fox Reader vs Whio

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fox Reader

Transform your personal library into lifelike audiobooks with on-device AI narration. Read along word-by-word, get instant chapter summaries, and track your reading habits. All your books and notes stay private on your device.

Highlights
  • On-device AI audiobook narration
  • Offline listening
  • Word-by-word synchronized reading
  • AI chapter summaries
  • Customizable reading themes and fonts
  • Highlighting, notes, and vocabulary builder
  • Reading progress tracking and goal setting
  • Automatic library organization
Features
Read full description

Fox Reader turns ANY BOOK you own INTO a lifelike AUDIOBOOK, ENTIRELY OFFLINE on your iPhone. Import an EPUB, PDF, or MOBI, press play, and listen in natural, expressive voices. No cloud. No account. Nothing leaves your device. It's a real reader, too: follow every word as it's spoken, study what you read, and track the habit, all in a beautiful library that's yours alone. LISTEN TO ANY BOOK, OFFLINE Lifelike, on-device AI narration for anything you import. Choose from multiple expressive voices and listen anywhere your iPhone goes: car speakers, AirPods, or a walk with no signal. No streaming, no buffering, no internet required. FOLLOW ALONG, WORD BY WORD Every line highlights in sync with the narration, so reading and listening reinforce each other. Ideal for learning a new language, building comprehension, supporting dyslexia or ADHD, or simply keeping your place when you glance down. Fox automatically skips tables of contents, front matter, and decorative clutter, so you only hear the story. CATCH UP WITH AI SUMMARIES Lost the thread? Fox generates instant 3-bullet recaps of the last few pages, your current chapter, or the chapter you just finished: so you can jump back in within seconds. A READER DESIGNED AROUND YOU Eight hand-crafted themes, including Sepia, Dark, Forest, and Twilight. Fine-tune fonts, sizes, weights, line spacing, margins, and alignment. Smooth page-curl animations and orientation lock round it out. HIGHLIGHTS, NOTES & VOCABULARY Highlight passages in six colors and attach notes to any range of words. Save words to a personal vocabulary list, then make them stick with five AI word games: Quiz, Puzzle, Hangman, Word Guess, and Riddle Rush. SEE YOUR READING GROW Every reading and listening session is tracked. Set daily and yearly goals, build streaks, and watch a 14-day activity chart with breakdowns by author and format. A LIBRARY THAT ORGANIZES ITSELF Build custom collections with emojis and pin favorites to your Home Screen. Smart collections auto-group your books: Currently Reading, Almost Finished, Short Reads, Long Reads, and more — while AI genre classification sorts the rest for you. TRACK SERIES & DISCOVER MORE Follow multi-book series from start to finish, keep a wishlist of books you haven't imported yet, and find new titles from authors you already love. Import your Goodreads library by CSV. SYNC ACROSS YOUR DEVICES Your library, reading progress, highlights, notes, and preferences move with you over iCloud. Start a chapter on iPhone, finish it on iPad, exactly where you left off. PRIVATE BY DESIGN The neural voices, AI summaries, and genre sorting all run on your device — not on a server. No account, no tracking, no uploads. Your books and your notes stay yours. SUPPORTED FORMATS EPUB · PDF · MOBI · TXT. Import from Files, email, iCloud Drive, or any document source. Your whole library, in your ears: and nothing leaves your phone. Download Fox Reader and press play. Privacy Policy: https://salmanahmad09.github.io/SalmanApps/privacy.html Terms of Use: https://salmanahmad09.github.io/SalmanApps/terms.html

About

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.

Highlights
  • 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
Features
Read full description

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

Fox Reader4 screens
Whio4 screens

Verdict

The call

The clearest difference is update cadence: Whio at every 10 days against Fox Reader's every 5 weeks. Fox Reader's advantage is ratings volume (3 vs 1). On price, rating, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fox Reader sells 3 in-app purchases, starting at $4.99 per month and Whio sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Fox Reader against 5.0 for Whio. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

Fox Reader ships an update every 5 weeks, Whio every 10 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard2 real differences · 8 level
Fox Reader versus Whio: the parameters behind the verdict, then further details
ParameterFox ReaderWhio
PriceFreeFree
Rating5.0 (3 ratings)5.0 (1 ratings)
Positive reviews—100.0% of reviews
Number of ratings3 — better1
Update frequencyEvery 5 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.226.0 — better
Further details — not scored
Size390 MB42 MB
Age rating4+4+
DeveloperSalman AhmadNil Coalescing Limited

Customer experience

Fox Reader

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Whio

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Fox Reader

Subscriptions3
  • Monthly7 Days trial$4.991 Month
  • Yearly Discounted7 Days trial$11.991 Year
  • Yearly7 Days trial$29.991 Year
3 purchases

Whio

Subscriptions2
  • Unlimited3 Days trial$0.997 Days
  • Unlimited3 Days trial$24.991 Year
One-time1
  • Lifetime Unlimited$49.99

Questions

Is Fox Reader free?
Fox Reader is free to download, with in-app purchases available.
Is Whio free?
Whio is free to download, with in-app purchases available.
Which has better reviews, Fox Reader or Whio?
Fox Reader and Whio are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.
Do Fox Reader or Whio have ads?
Neither Fox Reader nor Whio shows ads.
Which is updated more often, Fox Reader or Whio?
Fox Reader ships an update every 5 weeks, and Whio every 10 days. Most recently, Fox Reader was updated on October 31, 2026 and Whio on November 6, 2026.

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