Comparison

Continuum vs AudioBookSync

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

Head to head
About

Continuum

Immerse yourself in reading and listening simultaneously with this app. It syncs your ePub text with audiobooks, tracks your progress across both formats, and even allows you to scan physical book pages to find the corresponding digital location.

Highlights
  • Simultaneous ePub reading and audiobook listening
  • Automatic progress tracking across formats
  • Scan physical pages to find ePub location
  • Chapter sync wizard for manual adjustments
  • Customizable ePub reader
  • Variable speed audio player
  • Library management with stats
Features
Read full description

Your ebook and your audiobook, synced on their own. Import both and Continuum matches the chapters for you. The text highlights along with the narration and the page turns itself. Your own files. One purchase, no subscription. Read, listen, or do both at once in Immersive mode. On iPhone and iPad. Some books are hard to put down. A chapter on the sofa. Another on the way. Or a quiet moment following the words as you listen to the narration. Listening is reading, too: you choose how to step into the story. IMMERSIVE, AUTOMATIC With chaptered EPUBs and audiobooks, Continuum links the chapters by itself, so you no longer have to match them one by one. Highlighting follows the narration word by word, and automatic page turns keep the passage in view. Choose the highlight color or turn it off. You can review and adjust any chapter link. YOUR BOOKS, NOBODY ELSE'S Import from Files or from a compatible Calibre library. Browse as a shelf or a list, and organize by title, author, and series. Read and listen offline when the files are on your device. MAKE EVERY PAGE YOUR OWN Adjust font, size, line spacing, margins, and background. Import your own TTF or OTF fonts. Highlight phrases or paragraphs, pick a color, and add notes. Revisit your annotations and bookmarks, search inside the book, or move through its chapters. Scan a page of your print copy to find that passage in the EPUB. FULL-FEATURED AUDIO Play M4B, MP3, and M4A. Adjust speed, set a sleep timer, and navigate by chapter. Background playback, Lock Screen controls, and CarPlay. ON IPHONE AND IPAD iCloud syncs your library, progress, bookmarks, annotations, and chapter links. Store imported EPUB and audio files in iCloud Drive and recover them on your other device. External audio folders are connected on each device. Imported fonts stay on the device where you add them. YOUR READING RHYTHM Weekly, monthly, and yearly activity, a calendar, streaks, and time per book. Reading, listening, and Immersive are counted separately, with the share of each. A SPACE FOR YOUR BOOKS A refreshed interface, revised dark mode, and portrait and landscape layouts. ONE PURCHASE, NO SUBSCRIPTION Unlock Immersive, reading, and listening with a single in-app purchase. No recurring fees. Restore your purchase with your Apple Account. WHAT IMMERSIVE NEEDS Matching EPUB and audiobook editions, both with chapters. Initial preparation downloads a model and takes a few minutes the first time. Continuous audio without chapter markers does not align reliably. * Books are not included. You bring your own legally obtained, DRM-free EPUBs and audiobooks. Continuum does not sell books or offer a catalog or service for obtaining them. It does not open DRM-protected files or remove DRM. The purchase unlocks app features only. Books shown in the screenshots are in the public domain. Terms of Use: https://continuumreader.app/terms.html Privacy: https://continuumreader.app/privacy.html

About

AudioBookSync

Features
Read full description

AudioBookSync is the intelligent audiobook player that bridges listening and reading. LISTEN YOUR WAY • Plays M4B, MP3 and MP3 folders • Background playback with lock-screen controls • Adjustable speed (0.5× to 3×) • Adaptive skip-back when resuming — AudioBookSync remembers where you stopped • Sleep timer (including "end of chapter") • Bookmarks with notes FIND ANY SPOT IN YOUR BOOK • Point the camera at a page — OCR + fuzzy matching jump the audio to the exact passage • Works with printed books, screenshots and handwritten pages • Fully on-device: no cloud, no upload, no tracking • Choose between Apple Speech (fast) or Whisper (local, best for German) READ WHERE YOU STOP LISTENING • Built-in EPUB reader with themes (Light/Dark/Sepia), 8 fonts, adjustable size and margins • "Listen here" button jumps from reader to the matching audio position • Seamless cross-navigation: open the book in either mode CARPLAY + HOME-SCREEN WIDGET • CarPlay: full library, chapter navigation and Now Playing while driving • Home-screen widget: current book with progress ring and quick actions • No subscription, no upsell — included with the free version iCLOUD DRIVE LIBRARY • Drop your audiobooks into iCloud Drive → AudioBookSync → Audiobooks • Bookmarks and library state stay on your device • Nothing ever leaves your iCloud account AUDIOBOOKSYNC PRO — OPTIONAL ONE-TIME PURCHASE The free version keeps one audiobook active at a time. Switch books for free at any time, or unlock Pro for: • Unlimited audiobooks — use your entire library at once • Multi-device sync — listening progress syncs automatically between iPhone and iPad via your private iCloud Drive • Shared transcription index — transcribe a book once, every other device picks up the index • Apple Watch — slice off a section of your audiobook, send it to your Apple Watch and listen offline — leave the iPhone at home. Position syncs back to iPhone and iPad automatically. NO ADS. NO SUBSCRIPTION. NO TRACKING. Your library, your bookmarks, your progress — all stored in your iCloud Drive.

Screenshots

Continuum4 screens
AudioBookSync4 screens

Verdict

The call

Continuum and AudioBookSync are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Continuum sells 1 one-off in-app purchase and AudioBookSync sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Continuum ships an update every 9 days, AudioBookSync every 2 weeks. Both last shipped on October 28, 2026.

ScorecardNo meaningful differences
Continuum versus AudioBookSync: the parameters behind the verdict, then further details
ParameterContinuumAudioBookSync
PriceFreeFree
Rating3.0 (4 ratings) — better—
Positive reviews40.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 9 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS17.0 — better18.6
Further details — not scored
Size31 MB12 MB
Age rating4+4+
DeveloperRJ DIGITAL HUB SLUHans-Peter Jordi

In-app purchases

1 purchases

Continuum

One-time1
  • Continuum$9.99
1 purchases

AudioBookSync

One-time1
  • AudioBookSync Pro$5.99

Questions

Is Continuum free?
Continuum is free to download, with in-app purchases available.
Is AudioBookSync free?
AudioBookSync is free to download, with in-app purchases available.
Do Continuum or AudioBookSync have ads?
Neither Continuum nor AudioBookSync shows ads.
Which is updated more often, Continuum or AudioBookSync?
Continuum ships an update every 9 days, and AudioBookSync every 2 weeks. Most recently, Continuum was updated on October 28, 2026 and AudioBookSync on October 28, 2026.

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