Comparison

TransFlow vs Doc Translator

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

Doc Translator

Features
Read full description

TRANSLATE DOCUMENTS. KEEP THE LAYOUT. Doc Translator uses accurate AI to translate complete documents into 100+ languages, including English, Spanish, French, German, and Arabic, while preserving the original layout and formatting. WORK WITH THE FILES YOU ALREADY USE Translate PDF, Word, Excel, PowerPoint, EPUB, images, subtitles, and more. With support for 30+ file types, you can translate reports, presentations, spreadsheets, books, manuals, research papers, resumes, and localization files. KEEP YOUR DOCUMENT INTACT • Preserve page layouts, tables, columns, images, and styles • Use OCR to translate scans and text inside images • Track progress and access recent translations SIMPLE WORKFLOW 1. Upload a file 2. Choose the target language and translation options 3. Review the credit cost 4. Download the translated file

Screenshots

TransFlow4 screens
Doc Translator4 screens

Verdict

The call

The clearest difference is update cadence: Doc Translator at every 5 days against TransFlow's every 17 months. Doc Translator also leads on iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases 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 and Doc Translator 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, Doc Translator every 5 days. The most recent releases landed on November 8, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 6 level
TransFlow versus Doc Translator: the parameters behind the verdict, then further details
ParameterTransFlowDoc Translator
PriceFreeFree
Positive reviews0.0% of reviews—
Update frequencyEvery 17 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS26.018.0 — better
Further details — not scored
Size11 MB18 MB
Age rating4+4+
Developer实 许炜桢 吕

In-app purchases

1 purchases

TransFlow

One-time1
  • TransFlow Pro$9.99
4 purchases

Doc Translator

One-time4
  • 100 Credits$2.99
  • 300 Credits$7.99
  • 1000 Credits$24.99
Show 1 more
  • 3000 Credits$69.99

Questions

Is TransFlow free?
TransFlow is free to download, with in-app purchases available.
Is Doc Translator free?
Doc Translator is free to download, with in-app purchases available.
Do TransFlow or Doc Translator have ads?
Neither TransFlow nor Doc Translator shows ads.
Which is updated more often, TransFlow or Doc Translator?
TransFlow ships an update every 17 months, and Doc Translator every 5 days. Most recently, TransFlow was updated on November 8, 2026 and Doc Translator on October 29, 2026.

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