Comparison

PDF Editor vs ReadSync

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

Head to head
About

PDF Editor

Edit, sign, and fill PDF documents with ease. This app allows you to add text, signatures, and annotations, and convert files to various formats. It offers a private and secure experience with on-device processing for most features.

Highlights
  • Sign documents with finger or Apple Pencil
  • Add text, checkmarks, and shapes
  • Highlight, underline, and strikethrough text
  • Convert PDFs to Word, images, and vice versa
  • Compress, merge, and split PDFs
  • Password protection for PDFs
Features
Read full description

PDF Fill & Sign Pro - Sign, Fill, Edit & Convert PDFs Your all-in-one PDF toolkit for iPhone. Sign contracts, fill forms, edit text, annotate and convert documents - fast, simple and private. SIGN DOCUMENTS IN SECONDS - Draw signatures with your finger or Apple Pencil - Save multiple signatures for quick reuse - Add date stamps in custom formats - Position and resize with precision FILL & EDIT PDFS - Add text anywhere with multiple fonts, colors and styles - Edit text and images in your PDFs - Insert checkmarks, X marks, shapes and lines - Perfect for contracts, applications and official forms ANNOTATE & MARKUP - Highlight, underline and strikethrough text - Add notes and comments, all in one annotation list - Freehand drawing with the pen tool - Bookmarks for quick navigation CONVERT & ORGANIZE - PDF to Word, Image to PDF and PDF to Image - Compress, merge and split PDFs - Protect PDFs with a password - Open Word, Excel, PowerPoint, image and TXT files - Use the tools right from the share sheet in other apps PRIVATE & SECURE - No account needed - just open and start - Your documents are processed right on your device - PDF to Word runs on our secure server, and your file is deleted immediately after conversion BEAUTIFUL & FAST - Clean, modern design with dark mode - Documents open instantly - Home screen quick actions for your favorite tools PERFECT FOR - Signing contracts and agreements - Filling tax forms and applications - Reviewing and annotating business documents - Managing personal paperwork Download now and get your documents done in seconds! Privacy Policy: https://pdf-fill-sign-f7de4.web.app/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ReadSync

Features
Read full description

ReadSync remembers where you stopped reading — on every device. Open a PDF on your Mac, read to page 120, then pick up your iPhone. ReadSync opens the same document on the same page. Your highlights, notes and bookmarks are already there. WHY READSYNC • Your reading position syncs automatically through iCloud — in the free version too • No account to create, no subscription, no company server holding your files • Works completely offline — syncing is a layer on top, never a requirement PICK UP WHERE YOU LEFT OFF • A Continue Reading row at the top of your library, most recent first • A Home Screen widget that opens the document on the page you left • Nothing to press: the page is saved as you read and travels with you READING • A quiet reader that hides its controls while you read • Night mode that darkens the page without draining the colour from your highlights • Single or two-page layout, vertical or horizontal scrolling • Adjustable default zoom • Translate any passage you select into your own language, on your device with Apple's built-in translation HIGHLIGHTS AND NOTES • Five highlight colours • Attach a note to any passage • Every highlight and note in one list — tap to jump straight to the page • Export everything from a document as a single file, to Notes, Mail or Files • Nothing is written into the PDF itself; your original file stays untouched FINDING YOUR PLACE • Full-text search inside the document • The PDF's own table of contents • Bookmarks for the pages you want to come back to YOUR LIBRARY • Add files from Files or iCloud Drive • Leave a file where it is, or copy it into ReadSync so it syncs across your devices • Cover, progress and page count at a glance • Sort by last read, title or date added READING STATS • Total reading time, and how much of it was this week • A chart of the last seven days • Progress for every document you have started FREE AND PRO The free version is a whole reader, not a demo: iCloud sync, night mode, search, table of contents, bookmarks, translation and all five highlight colours, with room for 5 documents and 10 highlights or notes in each one. ReadSync Pro lifts both limits and opens reading stats, note export and the widget. It is a one-time purchase — there is no subscription. A limit only ever stops you adding something new. Everything already in your library stays open, in full, whether you buy or not. PRIVACY ReadSync is built entirely with Apple's own frameworks and stores everything in your private iCloud database. Your documents are never uploaded to anyone else's server. Anonymous usage statistics are sent only if you agree when asked, and never include your files, page contents, notes or highlights.

Screenshots

PDF Editor4 screens
ReadSync4 screens

Verdict

The call

The clearest difference is in-app purchases: PDF Editor at none against ReadSync's 1. PDF Editor also leads on update cadence (every 9 days vs every 2 months) and iOS requirement (15.0 vs 18.0). ReadSync's advantage is ads (none vs shown). On price 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. ReadSync sells 1 one-off in-app purchase. PDF Editor asks for nothing beyond the download.

UpkeepUpdate frequency

PDF Editor ships an update every 9 days, ReadSync every 2 months. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 5 level
PDF Editor versus ReadSync: the parameters behind the verdict, then further details
ParameterPDF EditorReadSync
PriceFreeFree
Rating4.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 9 days — betterEvery 2 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better18.0
Further details — not scored
Size30 MB4 MB
Age rating4+4+
Developer军 夏Alper Albayrak

In-app purchases

None

PDF Editor

No in-app purchases

1 purchases

ReadSync

One-time1
  • Unlock Pro$19.99

Questions

Is PDF Editor free?
PDF Editor is free to download, with no in-app purchases.
Is ReadSync free?
ReadSync is free to download, with in-app purchases available.
Do PDF Editor or ReadSync have ads?
PDF Editor shows ads; ReadSync does not.
Which is updated more often, PDF Editor or ReadSync?
PDF Editor ships an update every 9 days, and ReadSync every 2 months. Most recently, PDF Editor was updated on October 6, 2026 and ReadSync on October 8, 2026.

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