Comparison

Readest vs Flippy

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

Head to head
About

Readest

This app is a powerful ebook reader designed for deep thinkers and researchers. It offers advanced annotation tools, seamless device syncing, and robust library management with OPDS and Calibre support. Enjoy a distraction-free reading experience with customizable modes and multi-book viewing for enhanced study and analysis.

Highlights
  • OPDS Online Libraries
  • Calibre Integration
  • Sync Across Devices
  • Bookshelf Management
  • Customizable Reading Modes
  • Multi-Book View
  • Advanced Annotations & Highlights
Features
Currently charting
Read full description

Readest is an ebook reader for people who read a lot, and who want their books, notes and reading position on whatever device is nearest. Open EPUB, PDF, MOBI, AZW3, FB2, CBZ, TXT and Markdown in one library. Pull books from OPDS catalogs or from your own Calibre server. Read, annotate, listen, translate. Made for iPhone and iPad • CarPlay, so you can keep listening on the road with playback controls on the dashboard • Download read-aloud voices per book and listen with no connection at all • Add books from Files, Mail or any share sheet, and read them in place instead of copying them into a second library • Open up to four books at once on iPad and arrange them how you like Reading • Paginated or scrolling, with custom fonts, themes, spacing and margins • Vertical text for CJK books • Contrast and refresh tuned for e-ink screens • Full-text search inside a book Your library • Browse, search and download from OPDS catalogs and public libraries • Connect to Calibre or Calibre-Web, covers and metadata included • Organize with bookshelf groups you can rename Notes • Highlights, bookmarks and structured notes • Copy a highlight together with a deep link back to the passage • Export your annotations Listening and languages • Text-to-speech with downloadable offline voices • Translate a sentence, a page, or an entire book • Wikipedia and dictionary lookup without leaving the page Sync • Readest Cloud, or bring your own: iCloud, Google Drive, OneDrive, WebDAV, S3 • KOReader sync keeps your progress in step with your e-reader • iPhone, iPad, Mac, all other platforms and the web Readest is open source. Support: support@readest.com Privacy Policy: https://readest.com/privacy-policy Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Flippy

Transform your PDFs into interactive books with realistic page-turning animations and an AI voice that reads aloud. Understand complex texts with AI-powered explanations and summaries. Organize your library and track your reading progress.

Highlights
  • Realistic page-turning animations
  • AI-powered text-to-speech narration
  • AI-driven explanations and summaries
  • Automatic table of contents generation
  • Library organization with collections
  • Offline reading and listening
Features
Read full description

Flippy turns your PDFs and EPUBs — even scanned books, manga and comics — into real, flippable books: pages curl under your finger, a natural voice reads every page aloud, and built-in AI explains anything you don't understand. REALISTIC PAGE FLIP Swipe anywhere and watch pages curl, fold and settle with real physics. Tap the edges to turn, or glide with the chapter scrubber. On iPad, two-page book mode turns pages over the spine like a real book, and on iPhone Duo the spine sits right on the fold. SCANNED BOOKS, NOW READABLE A PDF that is just pictures of pages — an old textbook, a scanned manga? Flippy recognizes the text on your device, so Read Aloud, selection, Define, AI and Contents work like on any other PDF. Latin-alphabet languages, Chinese, Japanese, Korean, Hindi, Arabic and Russian. LISTEN TO ANY BOOK (Premium) Any PDF or EPUB becomes an audiobook. 8 natural voices read in the language of the text. Lock-screen controls, screen-off listening, speed from 0.75x to 2x. Highlight while you listen; tap the chip to return to the voice. Page numbers and repeated headers are skipped. Hearing the words while you see them helps readers with dyslexia, low vision and ADHD. TAKE IT WITH YOU Download a chapter — or just the pages you pick — and listen offline like a podcast. Saved it in another voice? Flippy tells you and switches in a tap. UNDERSTAND ANYTHING (Premium) Highlight a confusing passage and tap the glowing orb for a clear explanation, right on the page. Ask about your book — or another book in your library, with page citations. The AI can see the page, too: ask about a chart, figure, table or comic panel, even one on another page. Or ask out loud and hear the answer back. STUDY SMARTER Turn any chapter into flashcards or a practice quiz, save study sets, get chapter summaries. Define any word in any language, hear it pronounced, and keep it in My Words with the book it came from. IN YOUR LANGUAGE Flippy speaks 18 languages, now including Japanese, and follows your device language. Arabic and Farsi get a full right-to-left interface. AI answers in the language you read in. SMARTER CONTENTS Every PDF gets a tap-to-jump table of contents, even without one: Flippy finds the chapters by itself right after you open the book. A Bible lists its 66 books, a scanned course every lesson. Plus instant text search. FREE CLOUD SYNC Sign in with Google — free for everyone — and your bookmarks, highlights, notes, reading positions, collections and reading stats follow you across devices. Your PDF and EPUB files are never uploaded. READING FEATURES • Import from files, URLs or Google Drive links; Collections, a Continue Reading card, progress and streaks • Bookmarks with notes; multi-color highlighting, drawing and annotation • Scroll mode — continuous vertical reading • Fullscreen with pinch-to-zoom • Two-page spreads on iPad — beautiful for manga, comics and sheet music (Right-To-Left supported) • Pure-black interface, easy on your eyes and battery; works offline FREE & PREMIUM Reading, highlighting, bookmarking and cloud sync are free, and your first week unlocks every Premium feature — no card, no account. Premium then adds read-aloud, AI explanations and summaries, offline audio, every highlight color, extra bookmarks and note export. Pro suits heavy listeners; one-time packs like the Boost add minutes and AI uses, no subscription needed. PRIVACY FIRST No ads. No selling your data. Your files are never uploaded, and highlights and notes stay on your device unless you choose Cloud Sync — free, optional, deletable any time. Read Aloud sends only the text it reads; AI sends your question, the relevant page text and pictures of the pages involved, so it can read charts and figures. Details in our privacy policy. Download Flippy and rediscover the pleasure of turning pages. Terms of Use: https://flippypdf.github.io/terms-of-use/ Privacy Policy: https://flippypdf.github.io/privacy-policy/

Screenshots

Readest4 screens
Flippy4 screens

Verdict

The call

Readest and Flippy both sit at 4.5 stars, but that hides the real split: 84% of Readest's written reviews are positive against 0% of Flippy's. Readest also leads on ads (none vs shown) and ratings volume (197 vs 20). Flippy's advantage is update cadence (weekly vs fortnightly). On price, rating, in-app purchases and monetization model 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. Readest sells 9 in-app purchases, starting at $4.99 per month and Flippy sells 6 in-app purchases, starting at $3.99 per month. 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 — 4.5 for Readest against 4.6 for Flippy. That said, the two scores are not equally well evidenced: Readest has 197 ratings behind it against 20, so its average is the more settled of the two. Written reviews are what separate them: 84% of Readest's written reviews are positive against 0% of Flippy's.

UpkeepUpdate frequency

Readest ships an update fortnightly, Flippy weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 6 level
Readest versus Flippy: the parameters behind the verdict, then further details
ParameterReadestFlippy
PriceFreeFree
Rating4.5 (197 ratings)4.6 (20 ratings) — better
Positive reviews84.0% of reviews — better0.0% of reviews
Number of ratings197 — better20
Update frequencyFortnightlyWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#185 — better—
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Mac — better
Requires iOS16.415.1 — better
Further details — not scored
Size58 MB34 MB
Age rating4+4+
DeveloperBilingify LLCTrison Braithwaite

Customer experience

Readest

All ratings191 ratings
Positive86.4%
Neutral5.2%
Negative8.4%
Written reviews288 reviews
Positive84.0%
Neutral5.6%
Negative10.4%

Flippy

All ratings20 ratings
Positive85.0%
Neutral10.0%
Negative5.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

9 purchases

Readest

Subscriptions4
  • Subscribe to Plus Plan$4.991 Month
  • Subscribe to Pro Plan$9.991 Month
  • Subscribe to Plus Plan$49.991 Year
Show 1 more
  • Subscribe to Pro Plan$99.991 Year
One-time5
  • 1 GB$9.99
  • 2 GB$14.99
  • Full Customization$19.99
Show 2 more
  • 5 GB$29.99
  • 10 GB$49.99
6 purchases

Flippy

Subscriptions4
  • Flippy Premium Monthly$3.991 Month
  • Flippy Pro Monthly$6.991 Month
  • Flippy Premium Yearly$29.991 Year
Show 1 more
  • Flippy Pro Yearly$59.991 Year
One-time2
  • Boost$2.99
  • Bulk$9.99

Questions

Is Readest free?
Readest is free to download, with in-app purchases available.
Is Flippy free?
Flippy is free to download, with in-app purchases available.
Which has better reviews, Readest or Flippy?
Flippy is rated higher. Readest averages 4.5 out of 5 from 197 ratings, while Flippy averages 4.6 from 20 ratings.
Do Readest or Flippy have ads?
Flippy shows ads; Readest does not.
Which is updated more often, Readest or Flippy?
Readest ships an update fortnightly, and Flippy weekly. Most recently, Readest was updated on October 30, 2026 and Flippy on October 31, 2026.

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