# DiffMaster: Compare Documents — PDF, DOCX, Contracts & Offline > PDF, DOCX, Contracts & Offline (iPhone/iPad app by 天美 邬.) - Source: https://appshunter.io/ios/app/diffmaster-compare-documents/id6779993065 (this page in markdown: same URL + `.md`) - Developer: [天美 邬](https://appshunter.io/developer/6779442501) - Category: Utilities, Developer Tools - Price: $29.99 - Age rating: 4+ - Requires: iOS 16.0 · 3 MB - Languages: American English, Arabic, Danish, Dutch, Finnish, French (France), German (Germany), Indonesian, Italian, Japanese and 11 more - Released: 2026-06-23 - Data updated: 2026-08-29 ## What is DiffMaster? 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. ## Version history (last 5 releases) ### 1.2.1 — 2026-07-07 Optimized overall performance for a smoother experience Fixed known issues to improve stability Thank you for using the app and for your continued support! ### 1.2.0 — 2026-07-03 ◆ 13 New Languages DiffMaster now supports 21 interface languages! Newly added: • Italian, Dutch, Polish • Swedish, Danish, Finnish, Norwegian • Traditional Chinese, Russian, Turkish • Arabic, Indonesian, Thai Switch anytime from Settings → Language. All in-app text, exports, and share content are fully localized. ◆ Improvements • Better memory usage when comparing very large files • Refined syntax highlighting for TypeScript and Kotlin • Improved VoiceOver labels in the diff view • Various stability and performance improvements Thank you for using DiffMaster! Please leave a review if you enjoy the app — it truly helps. ### 1.1.1 — 2026-07-02 Bug fix ### 1.1.0 — 2026-06-26 • Improved file comparison performance for smoother large file handling • Improved iPad list display • Fixed an issue where the app did not return to home screen after opening files from Files app • Fixed file type detection for certain formats • Other stability improvements and bug fixes ### 1.0.0 — 2026-06-18 No release notes. ## More apps by 天美 邬 - [MetaWipe — Photo & Video Wipe](https://appshunter.io/ios/app/metawipe-photo-and-video-wipe/id6783396730) - [PasteCue: Clipboard Manager](https://appshunter.io/ios/app/pastecue-clipboard-manager/id6787896023) All apps by 天美 邬: https://appshunter.io/developer/6779442501 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*