Comparison

PDF Translator vs InkStack

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

Head to head
About

PDF Translator

Instantly translate and edit PDF documents and various file formats across 136 languages. Preserve formatting and layout with powerful translation and editing tools. Access translations seamlessly from any app.

Highlights
  • Translate PDFs, images, Word, Excel, PowerPoint
  • Edit PDF text and images
  • Translate multilingual PDFs
  • Choose translation engine (Google/Microsoft)
  • Unlimited page and MB translation
  • Language Detection
  • Scan, convert, and translate photos
Features
Read full description

TRANSLATE PDF, WORD, EXCEL AND POWERPOINT — AND KEEP THE LAYOUT Most translators hand you back a wall of text. PDF Translator hands you back your document: the same tables, the same columns, the same letterhead and the same page breaks — in a new language. Try it before you pay. No account, no card. KEEPS YOUR FORMATTING - Tables stay tables and columns stay aligned. - Logos, headers, footers and images stay exactly where they were. - Page layout is preserved, so a translated contract still reads like a contract. - Documents that mix several languages can be translated into one single language. EVERY DOCUMENT YOU ACTUALLY WORK WITH - PDF, Word (.docx), Excel (.xlsx), PowerPoint (.pptx) and photos. - Scanned paperwork: built-in OCR reads the page first, then translates it. - Long documents: split and translated automatically, however many pages. - Up to 133 languages, with automatic language detection. TRANSLATE WITHOUT LEAVING THE APP YOU ARE IN Share a document straight from Mail, Files, Safari or any other app using the built-in extension, and get the translated file back without switching apps. STRAIGHT ANSWERS ON CREDITS - One page costs one credit, and you see the page count before anything is spent. - If a translation fails, the credit goes back into your balance automatically. - No machine-translation watermark on your translated documents. A FULL PDF TOOLKIT AS WELL - Edit the text and images inside a PDF. - Compress a PDF to reduce its file size. - Split, merge and scan, and convert photos into PDF. - Rename, save and share your files, with full Dark Mode support. CHOOSE YOUR ENGINE Translate with Microsoft or Google, whichever you prefer for your language pair. Built for iPhone, iPad and Mac. Terms of service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://www.pdftranslator.dk/privacy-policy

About

InkStack

Features
Read full description

Inkstack is the on-device PDF maker for iPhone: write it, say it, or snap it — then save a PDF without uploading your files. CREATE A PDF • Text to PDF — type notes or a letter and export a clean multi-page document • Voice to PDF — dictate, edit the transcript, then save • Image to PDF — photos or camera; each picture becomes a page EDIT WHAT YOU ALREADY HAVE • Merge PDFs into one file • Split a PDF into single pages • Rotate, reorder, or delete the pages you tap • Drag to highlight exact words — not a random box on page one • Sign with your finger • Fill forms and add a watermark • Search text in the document PROTECT & SHARE • Password-protect before you send • Compress for email and WhatsApp • OCR for scans so text is selectable • Print, share, or export pages as images • Saved files live in the Files tab on this iPhone WHY INKSTACK No account. No cloud for your documents. Create from notes, voice, or photos first — then merge, split, sign, and lock. The app is free and supported by labeled ads. Ads never cover buttons or the keyboard. Tools are not locked behind ads. Privacy: https://sites.google.com/view/inkstackprivacypolicy Support: https://sites.google.com/view/instack-sup

Screenshots

PDF Translator4 screens
InkStack4 screens

Verdict

The call

The clearest difference is in-app purchases: InkStack at none against PDF Translator's 13. PDF Translator's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 26.2). On price, update cadence and ads 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. PDF Translator sells 13 in-app purchases, starting at $7.99 per 7 days. InkStack asks for nothing beyond the download.

UpkeepUpdate frequency

PDF Translator ships an update monthly, InkStack every 3 weeks. The most recent releases landed on October 25, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 7 level
PDF Translator versus InkStack: the parameters behind the verdict, then further details
ParameterPDF TranslatorInkStack
PriceFreeFree
Rating4.2 (477 ratings) — better—
Positive reviews17.2% of reviews—
Number of ratings477 — better—
Update frequencyMonthlyEvery 3 weeks — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better26.2
Further details — not scored
Size99 MB17 MB
Age rating4+4+
DeveloperAlex Gameli HeymanYogesh Rathod

Bugs and requests

PDF Translator

Reported bugs

13 issues
  • Server errors preventing translation completion
  • App crashes when opening or uploading PDFs
  • Credits deducted despite failed translations
  • Text rendered as gibberish or random characters
  • Overlapping of original and translated text
Show 8 more
  • Missing text sections in translated documents
  • Incorrect font sizes and spacing in output
  • Language detection failures
  • Translated text not saving properly
  • Payment processing issues
  • Credits not appearing after purchase
  • Inconsistent translation quality across documents
  • Watermark artifacts appearing in output

Requested features

10 requests
  • Subscription-based pricing (monthly/yearly/lifetime) instead of per-page
  • Free trial with full functionality before purchase
  • Automatic language detection without manual selection
  • Batch processing for multiple documents
  • Edit functionality for translated text
Show 5 more
  • Document preview before payment
  • Transparent pricing information before download
  • Better language selection interface
  • Support for image text translation
  • Offline translation capability

InkStack

Not enough reviews yet to summarise bugs or requests.

In-app purchases

13 purchases

PDF Translator

Subscriptions6
  • PDF Translator Weekly3 Days trial$7.997 Days
  • PDF Editor Monthly$9.991 Month
  • PDF Translator Lite$12.991 Month
Show 3 more
  • PDF Translator Standard$19.991 Month
  • PDF Translator Premium$69.991 Month
  • PDF Editor Yearly Access$99.991 Year
One-time7
  • PDF Translate 3 Pages$0.99
  • PDF Translate 10 Pages$2.99
  • PDF Translate 20 Pages$3.99
Show 4 more
  • PDF Translate 50 Pages$12.99
  • PDF Translate 100 Pages$19.99
  • PDF Translator 200 Pages$39.99
  • PDF Translate 500 Pages$84.99
None

InkStack

No in-app purchases

Questions

Is PDF Translator free?
PDF Translator is free to download, with in-app purchases available.
Is InkStack free?
InkStack is free to download, with no in-app purchases.
Do PDF Translator or InkStack have ads?
Both PDF Translator and InkStack show ads.
Which is updated more often, PDF Translator or InkStack?
PDF Translator ships an update monthly, and InkStack every 3 weeks. Most recently, PDF Translator was updated on October 25, 2026 and InkStack on October 12, 2026.

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