Show HN: I spent 10 months building a Markdown editor for Mac, iOS and web

Beauty is a cross-platform Markdown editor for Mac, iOS, and web that renders tables, KaTeX math, and Mermaid diagrams in real-time. It stores notes as local .md files with 200-version history and utilizes WebRTC for peer-to-peer syncing. The editor functions without accounts or ads, offering an optional subscription for iCloud-based synchronization.