AI_Compare

# AI Compare — Privacy Policy & Features ## Privacy Policy **Effective date:** June 2026 **Developer:** Darren Wilson ### Summary AI Compare does not collect, store, transmit, or share any personal data. All file processing happens entirely on your device. ### Data Collection AI Compare collects **no data whatsoever**. Specifically: - No analytics or telemetry - No crash reporting sent to external servers - No advertising identifiers - No user accounts or registration - No network requests of any kind ### File Access The app requests access to files you explicitly select using the system file picker or drag-and-drop. Files are read locally for comparison purposes only and are never copied, cached beyond the active session, or transmitted anywhere. ### Third-Party SDKs None. AI Compare has no third-party dependencies. ### Contact For privacy questions or concerns, open an issue at: https://github.com/YOUR_USERNAME/AI_Compare/issues --- ## Features ### Core Comparison - Side-by-side file diff with line-level change detection - Myers diff algorithm for small files; optimised linear diff for large files - Character-level highlighting within changed lines - Colour-coded changes: red (deleted), green (inserted), yellow (modified) - Gutter bar indicators for instant visual scanning ### File Format Support - **Plain text** — `.txt`, `.md`, `.csv`, and any UTF-8 encoded file - **Source code** — Swift, Python, JavaScript, TypeScript, HTML, CSS, JSON, XML, YAML, Shell, C, C++ - **JSON** — automatically pretty-printed and key-sorted before diffing, making minified JSON fully comparable - **PDF** — text extraction via PDFKit; falls back to image render for scanned/image-only PDFs - **Word documents** — `.docx` text extraction without requiring Microsoft Word - **Images** — side-by-side visual comparison with pixel-level difference overlay ### Large File Handling - Long lines (minified files, base64 blobs) are soft-wrapped at 200 characters for readability - Files over 3,000 combined lines use an O(N) hash-based diff to stay responsive - Character-level diff is skipped for lines over 500 characters to maintain performance ### Navigation - Previous / Next difference buttons with position counter (e.g. "3 / 12") - Scroll jumps directly to the selected difference in both panes simultaneously ### Display - Synchronized scrolling — both panes scroll together vertically - Independent horizontal scrolling per pane to inspect long lines - Line number toggle - Adjustable font size (9pt – 24pt monospaced) - Customisable highlight colour via colour picker - Full dark mode support - No scroll bounce — horizontal scroll stops cleanly at content edges ### Platform Support - **iPad** — side-by-side layout, optimised for large screen - **iPhone** — tabbed layout switching between File A and File B - **Mac (Designed for iPad / Native)** — side-by-side layout with AppKit scroll views ### Performance - Diff computed on a background thread — UI stays responsive during calculation - UITableView / NSTableView row virtualisation — thousands of lines scroll smoothly - Lazy attributed string rendering — no upfront allocation cost for large files