MathDown vs Hashy

Pay once, use forever. No subscriptions! Write markdown documents with live LaTeX math rendering. Expressions inside $ and $$ blocks are automatically parsed, evaluated, and displayed as beautifully typeset equations. • Define variables and reuse them across your document • Create functions like let f(x) = x^2 and evaluate them • Automatic algebraic simplification combines like terms • Full LaTeX support: fractions, roots, subscripts, superscripts Perfect for math notes, homework, tutorials, or any document where you want calculations that update as you type.

The markdown editor that thinks with you. Hashy is a native markdown editor with built-in AI chat, iCloud sync, and Claude Code integration. Your notes are plain .md files - no proprietary formats, no lock-in. FEATURES • Native SwiftUI - Fast, smooth, built for Apple devices. Not Electron. • iCloud Sync - Notes sync seamlessly across all your devices • AI Chat with Tools - 11 tools let AI create, edit, search, and organize your notes autonomously • 9+ AI Models - Claude, Gemini, DeepSeek, Grok via OpenRouter. Switch anytime. • Claude Code Skill - Terminal AI agents understand your vault format and structure • Plain Markdown - YAML frontmatter for metadata. Standard .md files you can read anywhere. • Interactive Tasks - Check and uncheck todo items with a tap • Wiki-links - Link notes with @ mentions and autocomplete • Keyboard Shortcuts - Designed for speed. Navigate, format, and manage notes from the keyboard. • No Subscription - Pay-per-use via your own OpenRouter key. No monthly fee. AI TOOLS The AI has 11 specialized tools that work directly on your notes: • Create and delete notes with title, tags, icon, and content • Read any note or search across all notes • Update content and metadata • Full-text search across your entire vault • List all notes and tags PERFECT FOR • Developers who think in markdown • Anyone building a personal knowledge base • Users who want AI assistance without vendor lock-in • People who value plain text and open formats YOUR MARKDOWN. YOUR MODELS. YOUR RULES. Download Hashy and bring your own OpenRouter API key. Open source under MIT license Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/