Comparison

Readium vs PDF Reader, Read Aloud

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

Head to head
About

Readium

Transform any text document, PDF, or web article into a natural-sounding audiobook. Follow along with highlighted words in real-time for improved focus and recall. Offers lifelike AI voices and offline playback for a private, distraction-free reading experience.

Highlights
  • Text-to-speech audiobook conversion
  • Real-time word highlighting
  • Lifelike AI and offline voices
  • Distraction-free reader with themes
  • Background playback with lockscreen controls
  • Supports EPUB, PDF, MOBI, and web articles
  • Adjustable playback speed
Features
Read full description

Turn any book, PDF, or web article into a natural-sounding audiobook — and follow every word as it's read aloud. Lifelike voices, online or offline. Read faster, remember more. Readium reads your books, PDFs, articles, and documents out loud with beautiful, human-sounding voices — while highlighting each word in real time so your eyes and ears work together. It's the calm, private way to get through your reading list. WHY READIUM • Listen and follow along — real-time word highlighting keeps you focused and boosts recall • Lifelike AI voices plus built-in device voices that work fully offline • Beautiful, distraction-free reader — 4 themes (Light, Dark, Slate, Sepia) and reading fonts • Background playback with lockscreen media controls showing the book title and author • Adjustable speed, sentence skip, and a sleep-friendly experience • Thousands of classic books from Project Gutenberg — one tap to add to your library • Optimized for iPhone and iPad, including split-view multitasking IMPORT ANYTHING • EPUB, PDF, MOBI, AZW3, and FictionBook (FB2) • Plain text, Markdown, and HTML files • Web articles — browse to any page inside Readium and add it with a tap • Share sheet — send a link from Safari or any other app straight to your library • Rename titles and edit authors to keep your library tidy HOW IT WORKS 1. Import a book, PDF, or paste a web link 2. Pick a voice — a lifelike AI voice or a device voice that works offline 3. Press play and follow the highlighted words VOICES IN YOUR LANGUAGE English, Spanish, French, German, Portuguese, and Bangla — with more on the way. Preview any voice before you pick. GREAT FOR Commuters and multitaskers. Students and researchers. Readers with dyslexia, ADHD, or low vision. Anyone who wants a beautiful, listen-along reading experience. Reading, but faster — and finally enjoyable. Download Readium and start listening.

About

PDF Reader, Read Aloud

Features
Read full description

PDF Reader helps you open, read, listen to, search, and manage PDF documents from one place. Features: • Open and read PDF files. • Listen to readable PDF text using text-to-speech. • Start listening from the page you are viewing. • Follow the spoken text with word highlighting. • Automatically continue to the next page while listening. • Search for words and phrases inside PDF documents. • Add annotations, highlights, and drawings. • Save your PDF changes. • Keep recently opened PDFs for quick access. • Add PDFs to Favorites. • Use light and dark appearance modes. PDF Reader provides a simple way to work with pdf documents whether you prefer reading on screen or listening to their text aloud. Some PDF files may contain scanned pages or images without readable text. Text-to-speech and search features require readable text in the PDF.

Screenshots

Readium4 screens
PDF Reader, Read Aloud4 screens

Verdict

The call

The clearest difference is ads: Readium at none against PDF Reader, Read Aloud's shown. PDF Reader, Read Aloud's advantage is update cadence (daily vs weekly). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Readium ships an update weekly, PDF Reader, Read Aloud daily. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 8 level
Readium versus PDF Reader, Read Aloud: the parameters behind the verdict, then further details
ParameterReadiumPDF Reader, Read Aloud
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyWeeklyDaily — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.416.0 — better
Further details — not scored
Size109 MB10 MB
Age rating12+12+
DeveloperRaquib Ul AlamNamik Ersun

In-app purchases

None

Readium

No in-app purchases

None

PDF Reader, Read Aloud

No in-app purchases

Questions

Is Readium free?
Readium is free to download, with no in-app purchases.
Is PDF Reader, Read Aloud free?
PDF Reader, Read Aloud is free to download, with no in-app purchases.
Do Readium or PDF Reader, Read Aloud have ads?
PDF Reader, Read Aloud shows ads; Readium does not.
Which is updated more often, Readium or PDF Reader, Read Aloud?
Readium ships an update weekly, and PDF Reader, Read Aloud daily. Most recently, Readium was updated on October 31, 2026 and PDF Reader, Read Aloud on October 29, 2026.

Other comparisons