Comparison

Crimson Pdf vs PDF Editor, Converter

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

Head to head
About

Crimson Pdf

This app offers a comprehensive suite of PDF editing and management tools, all processed locally on your device. Convert, scan, sign, and organize documents with advanced features like OCR and form filling. It prioritizes user privacy with no data collection or network requests for core functions.

Highlights
  • Convert PDFs to various formats (Word, Excel, images)
  • Scan documents with OCR and auto edge detection
  • Sign and annotate PDFs with Apple Pencil support
  • Organize pages, merge, split, and compress files
  • Fill and save PDF forms
  • 100% on-device processing for privacy
  • Available in 17 languages
Features
Read full description

Crimson Pdf is the everyday PDF toolkit for iPhone and iPad. Convert, scan, sign, edit and protect documents — all 100% on-device. Nothing uploaded, nothing tracked, completely free with no in-app purchases or ads. Whether you're sending an invoice from a coffee shop, signing a lease before a viewing, or compressing a 200-page report for email, Crimson handles it in seconds. Powered by Apple's native PDFKit, VisionKit and PencilKit frameworks for instant offline processing. ■ CONVERT — 10 TOOLS Turn PDFs into Word (DOCX / RTF), Excel (XLSX), PowerPoint (PPTX), images (JPG / PNG), plain text and CSV. Convert back the other way: images, Word (.docx / .doc / RTF / HTML / TXT), Excel spreadsheets and PowerPoint slides into clean PDFs. ■ SCAN & OCR Snap any printed page with the built-in scanner — auto edge detection, perspective correction, multi-page output. Extract searchable text from photos and PDFs using Apple's on-device Vision framework. Nothing is sent to a server. ■ SIGN & ANNOTATE Draw your signature with Apple Pencil or finger using PencilKit, then stamp it onto any contract. Highlight, add sticky notes, and erase — all with precise tap targeting on the page. ■ ORGANIZE Merge, split, rotate, reorder pages. Compress to shrink a 10 MB PDF down to ~1 MB before sharing. Lock with a password. Add page numbers (1, 1/12, or Page 1 of 12 styles) and watermarks for confidential drafts. ■ FORMS Detect and fill PDF form fields automatically. Save filled copies without flattening so you can edit later. ■ DESIGNED FOR iOS Built entirely with SwiftUI for iOS 17 and above. Clean light theme, smooth gradient animations, haptic feedback, dynamic type and accessibility support. Files surface in the iOS Files app — no walled garden. ■ PRIVACY FIRST — NO DATA COLLECTED Every conversion, scan and OCR pass runs on your device. No cloud uploads, no analytics, no tracking, no third-party processing. Crimson Pdf makes zero network requests for its core functionality. ■ MULTI-LANGUAGE Available in 17 languages: English, Vietnamese, Spanish, French, German, Portuguese (Brazilian & European), Arabic, Hindi, Bengali, Indonesian, Japanese, Korean, Russian, Turkish, Chinese (Simplified & Traditional). Crimson Pdf is completely free. Every tool is unlocked from day one — no ads, no subscriptions, no in-app purchases.

About

PDF Editor, Converter

Features
Read full description

Managing PDF files has never been easier. Whether you're a student, professional, or just someone who deals with documents daily, this app gives you everything you need to create, edit, convert, and organize your PDFs — all in one place, right from your phone. No more switching between multiple apps or waiting to get to your computer. With a clean, intuitive interface, this app puts powerful PDF tools right in your pocket, so you can handle documents on the go, save time, and stay productive wherever you are. Your files stay organized too — every document you work with is automatically saved in your file history, so you can pick up right where you left off. **Key Features:** - **Convert File** – Turn PDFs into other formats or convert files into PDF instantly - **Compress PDF** – Reduce file size without losing quality, perfect for sharing and emailing - **Scan Documents** – Use your camera to scan physical documents into clean, sharp PDFs - **Create PDF** – Build new PDF files from scratch in seconds - **Merge PDFs** – Combine multiple PDF files into a single document - **Reorder Pages** – Rearrange pages exactly the way you want them - **Delete Pages** – Remove unwanted pages from any PDF - **Split PDF** – Break large PDFs into smaller, separate files - **Lock PDF** – Protect sensitive documents with a password - **Unlock PDF** – Remove passwords from PDFs you have access to - **Sign PDF** – Add your signature directly to documents, no printing required - **Image to PDF** – Convert photos and images into PDF files - **PDF Reader** – View and read PDF files with a smooth, reliable reader - **Rotate PDF** – Fix page orientation with a single tap Whatever your document needs — reading, editing, converting, or securing files — this app is built to handle it all quickly and reliably. **Privacy Policy:** [https://sites.google.com/view/za-apps/private acy-policy] **Terms of Service:** [https://sites.google.com/view/za-apps/terms-of-service]

Screenshots

Crimson Pdf4 screens
PDF Editor, Converter4 screens

Verdict

The call

Crimson Pdf and PDF Editor, Converter are too close to call on the numbers: across 7 compared parameters — price, rating, ratings volume and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Crimson Pdf against 5.0 for PDF Editor, Converter. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

ScorecardNo meaningful differences
Crimson Pdf versus PDF Editor, Converter: the parameters behind the verdict, then further details
ParameterCrimson PdfPDF Editor, Converter
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequency—Every 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better17.6
Further details — not scored
Size5 MB6 MB
Age rating4+4+
DeveloperNguyen Trong NhanMuhammad Zeeshan Akram

In-app purchases

None

Crimson Pdf

No in-app purchases

None

PDF Editor, Converter

No in-app purchases

Questions

Is Crimson Pdf free?
Crimson Pdf is free to download, with no in-app purchases.
Is PDF Editor, Converter free?
PDF Editor, Converter is free to download, with no in-app purchases.
Which has better reviews, Crimson Pdf or PDF Editor, Converter?
Crimson Pdf and PDF Editor, Converter are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Crimson Pdf or PDF Editor, Converter have ads?
Neither Crimson Pdf nor PDF Editor, Converter shows ads.

Other comparisons