Peridot Markdown

Peridot opens a folder of Markdown files and turns it into a workspace. Reading, editing and printing to PDF are free for as long as you use the app. An optional subscription adds document conversion, AI, folder-wide search and cloud sync — the features listed under PREMIUM below. Your notes stay as plain .md files in your own folders — no upload step, no account required, and nothing locked in a format only this app can read. WHAT IT DOES • Renders Markdown with Mermaid diagrams, maths and syntax-highlighted code • A knowledge graph of the links between your notes • Reads the text out of the PDFs in your folder, on your own device • Runs JavaScript blocks in the app, sandboxed and offline • Themes, focus mode, split view and a command palette • Works offline, on iPhone and iPad FREE, FOR AS LONG AS YOU USE IT Opening folders, editing, previewing, the graph, Mermaid diagrams, maths,…