Comparison

Babel Reader vs PDFTranslator

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

Head to head
About

Babel Reader

Read foreign language PDFs with on-the-fly page translation. This tool supports text-based PDFs and allows seamless comprehension of documents in different languages while you read.

Highlights
  • Translate current page while reading
  • Supports text-based PDFs
  • Foreign language document comprehension
  • Seamless reading experience
Features
Read full description

Babel Reader is a tool for reading foreign language PDFs, which can translate the current page at any time while reading. Currently, it only supports PDFs in text format, not scanned PDFs in image format.

About

PDFTranslator

Features
Read full description

PDF Translator: Keep Layout is the iOS and Mac app that translates PDF documents while preserving the exact layout — every chart, formula, image, and text box stays right where it is. Reading foreign-language articles, manuals, contracts, or textbooks? The translated text lands inside the original page design — no flow broken, no references lost. Key features: • Industry-leading AI: Upgraded engine with noticeably higher accuracy on terminology, idioms, and domain-specific phrasing. From quantum physics to legal contracts — translation stays precise and idiomatic across all 49 languages. • Editable exports: Export your translated PDF as a fully editable Microsoft Word, PowerPoint, or Excel file — ready for citation, sharing, or further editing. • Scans and images supported: Reading a scanned PDF? Our built-in OCR runs 100 % locally on device with handwriting-friendly recognition, handling mixed text and images with high accuracy — even in multilingual documents. • 49 languages: English, Chinese, Japanese, Korean, Spanish, French, German, and many more major languages, plus 14 Pro-exclusive academic languages (Latin, Sanskrit, Swahili, Khmer, Kazakh, Uzbek, Mongolian, and others). Also included (Pro): • Word (.docx), Excel (.xlsx), PowerPoint (.pptx) — translated directly at the source XML layer, with fonts and formatting preserved at 99 %. • Image translation (JPG, PNG, HEIC, WebP, TIFF, GIF, BMP) — translate photos, screenshots, or still frames directly. • Scientific formula preservation (LaTeX, MathML, OMML) — equations remain in their original notation. • Built-in OCR — runs 100 % locally on device for full privacy. • Full layout preservation — block-level fidelity to layout, column structure, and reading order. • PDF/A and scanned PDF support with OCR. • 14 Pro-exclusive academic languages, including ancient and minority languages. Supported formats: PDF, DOCX, XLSX, PPTX, JPG, PNG, HEIC, WebP, TIFF, GIF, BMP. PDF Translator: Keep Layout is designed for students, researchers, lawyers, and professionals who need accurate, natural, and readable translations of complex multilingual documents. Privacy: All OCR and translation runs locally on your device. Your documents never leave it. Terms: https://www.apple.com/legal/itunes/dev/stdeula/ Privacy Policy: https://translayout.com/privacy

Screenshots

Babel Reader2 screens
PDFTranslator4 screens

Verdict

The call

The clearest difference is in-app purchases: Babel Reader at none against PDFTranslator's 3. Babel Reader also leads on iOS requirement (14.0 vs 16.6). PDFTranslator's advantage is ads (none vs shown). On price, update cadence 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. PDFTranslator sells 3 in-app purchases, starting at $0.99 per 7 days. Babel Reader asks for nothing beyond the download.

UpkeepUpdate frequency

Babel Reader ships an update every 4 days, PDFTranslator weekly. The most recent releases landed on September 19, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Babel Reader versus PDFTranslator: the parameters behind the verdict, then further details
ParameterBabel ReaderPDFTranslator
PriceFreeFree
Rating4.5 (23 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings23 — better—
Update frequencyEvery 4 days — betterWeekly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS14.0 — better16.6
Further details — not scored
Size16 MB19 MB
Age rating4+4+
DeveloperSeedvector LLC琳 李

In-app purchases

None

Babel Reader

No in-app purchases

3 purchases

PDFTranslator

Subscriptions3
  • Pro Weekly$0.997 Days
  • Pro Monthly$5.991 Month
  • Pro Yearly3 Days trial$29.991 Year

Questions

Is Babel Reader free?
Babel Reader is free to download, with no in-app purchases.
Is PDFTranslator free?
PDFTranslator is free to download, with in-app purchases available.
Do Babel Reader or PDFTranslator have ads?
Babel Reader shows ads; PDFTranslator does not.
Which is updated more often, Babel Reader or PDFTranslator?
Babel Reader ships an update every 4 days, and PDFTranslator weekly. Most recently, Babel Reader was updated on September 19, 2026 and PDFTranslator on October 1, 2026.

Other comparisons