Comparison

TransFlow vs ZapRead

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

Head to head
About

TransFlow

This app translates EPUB books into your preferred language, offering both full translations and bilingual reading modes. Enjoy your books page by page with customizable themes and fonts, or export translated versions to other readers. Your privacy is maintained as all translations are done on-device.

Highlights
  • Translate EPUBs between many languages
  • Translation-only or bilingual reading
  • Paginated reading with customizable themes
  • Export translated books to other EPUB readers
  • On-device translation for privacy
  • Supports iPhone, iPad, and Mac
Features
Read full description

Read any book in your language. TransFlow turns a foreign-language EPUB into a fully translated book, using Apple’s on-device translation. No account, no API key, no uploads — your books stay with you. Read the translation on its own, or go bilingual with each original passage followed by its translation — a natural way to enjoy the original and learn a language along the way. Then read it right here, page by page, or take the translated book to any EPUB reader you like. Key features: - Translate reflowable EPUBs between many languages, with the book’s language detected automatically - Translation-only or bilingual reading - Paginated reading with themes, font size, line spacing and margins - Reading theme that follows the system light/dark appearance - 60+ downloadable fonts for many languages - Export translated books to Apple Books, ReadFlow, or any EPUB reader - Made for iPhone and iPad, including landscape and Split View Free to download, and translating and reading stay free. TransFlow Pro is a one-time purchase — no subscription — that unlocks bilingual reading, unlimited exports (3 free to try), the automatic light/dark theme and extra fonts. Buy once, use it on iPhone, iPad and Mac. Your books stay yours: nothing uploaded, no subscription, and the translations go wherever you read. Fixed-layout EPUBs (comics, picture books) are not supported. Available languages and translation quality depend on Apple’s on-device translation. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://is.gd/xWX6SJ

About

ZapRead

Features
Read full description

Read Faster. Retain More. Train Your Brain. ZapRead uses RSVP (Rapid Serial Visual Presentation) technology to help you read 2-3x faster than normal. Whether you're catching up on articles, reading books, or processing emails, ZapRead makes it effortless. HOW IT WORKS Traditional reading requires your eyes to move across lines of text, which slows you down. ZapRead eliminates this by displaying one word at a time in the same spot. Your eyes stay fixed, and your brain processes words faster. Each word flashes with its focus letter highlighted in red—the letter your eye naturally focuses on. This smart timing helps your brain recognize words instantly. FEATURES • Universal Speed Reading — Paste any text: articles, books, emails, PDFs. Clean, distraction-free reading experience with progress tracking. • Customizable Speed — Adjust WPM (Words Per Minute) from 100 to 1000+. Quick presets: Beginner (200), Average (300), Fast (450), Expert (700). Real-time speed adjustment while reading. • Smart Focus Algorithm — Automatically calculates the optimal focus point. Red letter guides your eye for instant word recognition. Proven to improve reading speed and comprehension. • Privacy First — No account required. Zero data collection. 100% offline - no internet needed. All processing happens on your device. WHO IT'S FOR • Students cramming for exams • Professionals processing reports and emails • Book lovers who want to read more • Anyone with a long reading list • People who want to train their brain THE SCIENCE RSVP technology has been studied since the 1970s and is proven to increase reading speed while maintaining comprehension. By eliminating eye movement and presenting words at your optimal pace, your brain can process information faster. WHY ZAPREAD? • Simple - Paste text and start reading in 2 seconds • Fast - Read at your own pace, from slow to blazing • Beautiful - Clean, dark interface reduces eye strain • Private - Your data stays on your device, period • Offline - No internet connection required NO SUBSCRIPTIONS. NO ADS. NO TRACKING. Download ZapRead today and unlock your brain's reading potential. Read faster. Learn more. Live better.

Screenshots

TransFlow4 screens
ZapRead4 screens

Verdict

The call

The clearest difference is in-app purchases: ZapRead at none against TransFlow's 1. ZapRead also leads on iOS requirement (13.0 vs 26.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. TransFlow sells 1 one-off in-app purchase. ZapRead asks for nothing beyond the download.

Scorecard2 real differences · 6 level
TransFlow versus ZapRead: the parameters behind the verdict, then further details
ParameterTransFlowZapRead
PriceFreeFree
Positive reviews0.0% of reviews—
Update frequencyEvery 8 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS26.013.0 — better
Further details — not scored
Size12 MB17 MB
Age rating4+4+
Developer实 许Borgo Technologies LLC

In-app purchases

1 purchases

TransFlow

One-time1
  • TransFlow Pro$9.99
None

ZapRead

No in-app purchases

Questions

Is TransFlow free?
TransFlow is free to download, with in-app purchases available.
Is ZapRead free?
ZapRead is free to download, with no in-app purchases.
Do TransFlow or ZapRead have ads?
Neither TransFlow nor ZapRead shows ads.

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