DiffMaster: Compare Documents

PDF, DOCX, Contracts & Offline

$29.99 · Designed for iPad. Not verified for macOS.

Compare PDF, DOCX, source code & 30+ formats side by side. Word-level diff highlights, 36 syntax colors, export as HTML or PDF. 100% offline, zero tracking. DiffMaster is the professional file comparison tool for developers, writers, and everyone who needs to spot every difference between two files — instantly and offline. Compare source code, PDF documents, Word files, JSON configs, Markdown notes, and much more, all with beautiful side-by-side diffs and precise word-level highlighting. ◆ CORE FEATURES • Side-by-Side Comparison Two synchronized panels with smooth scrolling. Additions in green, deletions in red, modifications in orange — differences at a glance. • Word-Level Diff Highlighting Not just changed lines — pinpoint the exact words that were modified within each line. • Native PDF & DOCX Support Compare PDF and Word documents directly. Text is extracted on-device with zero third-party dependencies. • 30+ File Formats Swift, Python, Java, JavaScript, TypeScript, Go, Rust, C, C++, Kotlin, Ruby, PHP, JSON, XML, YAML, TOML, Markdown, HTML, CSS, SQL, and many more. • Syntax Highlighting Automatic syntax coloring for 36 programming languages: keywords, strings, comments, and numbers stand out beautifully. • Diff Navigation & Search Jump to previous/next difference with one tap. Search for any keyword inside comparison results. • Export in 4 Formats Unified diff, HTML report, PDF report, or plain text. Share instantly via the system share sheet. • Clipboard Compare Paste text directly from your clipboard — no need to save a file first. • Drag & Drop Drag files onto the selection area to import them instantly. • Control Center Widget (iOS 18+) One-tap launch straight from Control Center. • Share Extension Send files to DiffMaster right from Files, Mail, or any app that supports sharing. ◆ PERSONALIZATION • Dark / Light Mode — follows system setting or switch manually • 6 Color Themes — Classic Blue, Ocean Green, Warm Orange, Elegant Purple, High Contrast, Rose Pink • Adjustable Font Size — slider control for the perfect reading size • 21 Interface Languages — English, Simplified & Traditional Chinese, Japanese, Korean, German, French, Spanish, Portuguese, Italian, Dutch, Polish, Swedish, Danish, Finnish, Norwegian, Russian, Turkish, Arabic, Indonesian, Thai ◆ EFFICIENT WORKFLOW • Keyboard Shortcuts (iPad) — Cmd+↑/↓ to navigate diffs, Cmd+F to search, Cmd+E to export • Recent Comparisons — auto-saved history with one-tap re-compare • Diff Statistics — see added, deleted, and modified line counts instantly • Landscape Support — wider view, ideal for iPad • Universal File Access — works with iCloud Drive, Files app, and every document provider • Siri Shortcuts — trigger DiffMaster with App Intents ◆ PRIVACY FIRST DiffMaster runs 100% offline. No personal data is collected. Files are processed only on your device and never uploaded. Zero third-party SDKs. Zero network requests. Zero tracking. ◆ PERFECT FOR • Developers reviewing code changes and pull requests • Writers and editors proofreading document revisions • Legal & compliance teams comparing contract versions • DevOps engineers diffing configuration files across environments • Students comparing solutions with reference answers • Translators checking source and translated documents ◆ PERFORMANCE • Handles files with 10,000+ lines — instant results, no slowdown • File access permissions remembered automatically — no repeated approval prompts • Smooth and reliable — built on Apple's latest technologies Download DiffMaster today and never miss a difference again.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Optimized overall performance for a smoother experience Fixed known issues to improve stability Thank you for using the app and for your continued support!

Version 1.2.1

The developer, 天美 邬, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • 天美 邬
    Size
    • 3.5 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 or later.
    • iPad
      Requires iPadOS 16.0 or later.
    • Mac
      Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 20 more
    • English, Arabic, Danish, Dutch, Finnish, French, German, Indonesian, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish
    Age Rating
    4+
    Copyright
    • © 2026 MayScience. All rights reserved.
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

    More by 天美 邬