Comparison

TransFlow vs PDF

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

Head to head
About

TransFlow

Translate foreign language EPUB books into your preferred language using on-device translation. Read translated books with customizable themes and export them to your favorite EPUB readers. Offers both translation-only and bilingual output options.

Highlights
  • On-device EPUB translation
  • Bilingual output option
  • Customizable reader themes
  • Queue multiple books for translation
  • Export translated EPUBs
  • Pause and resume translation
Features
Read full description

Designed for reading in your language! TransFlow turns foreign-language EPUBs into translated EPUBs using Apple’s on-device translation. No API keys, no accounts, no servers — your books never leave your device. Key features: Import a reflowable EPUB, pick source and target languages, and translate on your device Leave anytime — the job pauses and picks up where it left off when you come back Queue several books; switching pauses the current one instead of losing progress Translation-only, or bilingual output that keeps each original passage with its translation below¹ Clean paginated reader with swipe or tap-to-turn pages; remembers your place (including iPad rotation and split screen) Reading themes, font size, line spacing, and margins; extra downloadable fonts¹ The result is a real EPUB — export to Apple Books, ReadFlow, or any EPUB reader¹ Free to download. Translating and reading stay free (translation-only). TransFlow Pro is a one-time purchase that unlocks bilingual output, unlimited exports (3 free to try), automatic light/dark reading theme, and extra fonts. For readers who want the file itself: export a real EPUB anytime and keep reading wherever you like. ¹ Bilingual output, unlimited exports, auto theme, and downloadable fonts require TransFlow Pro. Fixed-layout EPUBs (comics, picture books, heavily designed layouts) are not supported. Translation quality and available languages 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

PDF

Instantly translate PDF documents using AI. Supports over 100 languages and preserves original formatting. Easily export and share translated files securely from your phone.

Highlights
  • PDF translation
  • AI-powered accuracy
  • 100+ language support
  • Easy export and sharing
  • Secure processing
Features
Read full description

PDF - AI Document Translator Break language barriers and translate your PDF documents instantly with the power of AI! Whether it’s an eBook, manual, report, or academic paper, PDF - AI Document Translator makes document translation fast, easy, and accurate — right from your phone. Key Features: PDF Translation: Upload any PDF and get it translated into your preferred language in seconds. AI-Powered Accuracy: Smart AI algorithms preserve the original meaning and formatting. Supports 100+ Languages: Translate between English, Spanish, French, Arabic, Chinese, Hindi, and more. Easy Export & Sharing: Save or share the translated PDF with just a tap. Secure & Private: Your documents are processed securely and never stored without permission. Who is it for? Students and researchers reading foreign-language papers Professionals handling global documentation Travelers and expats translating contracts, guides, or forms Anyone needing quick and reliable document translation! Why choose PDF - AI Document Translator? Say goodbye to copy-pasting from PDFs into translation apps. Our app handles complex documents with ease — making translation smarter, faster, and more convenient. Download PDF - AI Document Translator now and experience the future of document translation!

Screenshots

TransFlow4 screens
PDF4 screens

Verdict

The call

The clearest difference is update cadence: PDF at every 2 months against TransFlow's every 17 months. PDF also leads on iOS requirement (15.6 vs 26.0). On price, ads, 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. TransFlow sells 1 one-off in-app purchase and PDF sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

TransFlow ships an update every 17 months, PDF every 2 months. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
TransFlow versus PDF: the parameters behind the verdict, then further details
ParameterTransFlowPDF
PriceFreeFree
Rating—4.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 17 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS26.015.6 — better
Further details — not scored
Size11 MB7 MB
Age rating4+4+
Developer实 许Yogesh Rathod

In-app purchases

1 purchases

TransFlow

One-time1
  • TransFlow Pro$9.99
4 purchases

PDF

One-time4
  • Five File Translation$4.99
  • Ten File Translator$8.99
  • Twenty File Translator$14.99
Show 1 more
  • Fifty File Translator$24.99

Questions

Is TransFlow free?
TransFlow is free to download, with in-app purchases available.
Is PDF free?
PDF is free to download, with in-app purchases available.
Do TransFlow or PDF have ads?
Neither TransFlow nor PDF shows ads.
Which is updated more often, TransFlow or PDF?
TransFlow ships an update every 17 months, and PDF every 2 months. Most recently, TransFlow was updated on November 8, 2026 and PDF on October 30, 2026.

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