PDFOne vs PreviewMD

**PDFOne makes working with PDFs simple on iPhone.** Open a document, organize its pages with intuitive gestures, add new content, fill in your PDF, and place your signature — all within a clean interface designed to keep the document at the center of your work. Whether you need to fix a few pages or reorganize a larger document, PDFOne gives you the essential tools without unnecessary complexity. **ORGANIZE YOUR PAGES** View your document as a Grid, Carousel, or List and choose the layout that works best for you. You can: • reorder pages with drag and drop; • select multiple pages; • create and manage page stacks; • duplicate or delete pages; • replace pages while keeping control of your document; • extract and reorganize content when needed. **ADD NEW CONTENT** Insert additional PDFs exactly where you need them, or create new pages from: • PDF documents; • images from your Photos library; • blank pages. **FILL IN PDFs** Add text directly to a PDF page, position it where it belongs, and adjust its size before applying it to the document. Perfect for forms, administrative documents, and PDFs that need additional information. **ADD YOUR SIGNATURE** Import a signature and keep it in your signature library so it is ready whenever you need it. Add multiple signatures, move them around the page, resize them, or remove them before applying your changes to the PDF. **SAVE AND SHARE** Save your changes, create a separate copy, or share the finished PDF using the familiar sharing tools built into iOS and iPadOS. **DESIGNED TO STAY SIMPLE** PDFOne is built as a native Apple app, with familiar controls, direct interactions, light and dark appearances, and an interface that keeps the focus on your document. No unnecessarily complicated tools. Just what you need to organize, fill, sign, and manage your PDFs.

PreviewMD is a fast, native editor and viewer for Markdown on iPad and iPhone — the same rendering as the Mac app, free on both. Open any .md file from Files or iCloud Drive, or start a new document right in the built-in browser. FOUR WAYS TO WORK • Preview — a clean reading view • Split — live preview beside the Markdown source, side by side on iPad and stacked on iPhone • Source — the Markdown alone, full width • Diff — see exactly what you've changed since you opened the file, word by word BEAUTIFUL RENDERING • GitHub-flavored Markdown: tables, task lists, footnotes and strikethrough • Syntax highlighting for almost two hundred languages • Math typesetting with KaTeX — $inline$ and $$display$$ • Diagrams with Mermaid — flowcharts, sequence, class, state, pie and gantt • GitHub-style alert callouts (> [!NOTE], [!WARNING], …) and emoji • Automatic light and dark mode WRITING ON A TOUCHSCREEN A formatting bar sits above the keyboard for bold, italic, inline code, headings, quotes, lists and links. With a hardware keyboard the same actions have shortcuts. YOUR DOCUMENTS, YOUR IMAGES Works with the Files app and iCloud Drive — documents open in place and save as you type, with no Save button to remember. Local images referenced by your document display right in the preview. EXPORT, SHARE & PRINT Export self-contained HTML or clean light-mode PDF straight to the share sheet, or print with proper pagination. QUICK LOOK Markdown files preview with PreviewMD's renderer in the Files app too. ONE APP EVERYWHERE Free on Mac as well — including Quick Look previews and thumbnails in Finder. Requires iOS/iPadOS 17 or later.