Overview

Hashy is a native SwiftUI markdown editor for macOS and iOS with built-in AI chat powered by OpenRouter, OpenAI, or Anthropic. Bring your own API key and pick from models like Claude Opus 4.6, Sonnet 4.5, GPT-5.2, Gemini, DeepSeek, and Grok with no monthly fee or vendor lock-in. The AI doesn't just chat — 11 tools let it create, edit, search, and organize your notes as an autonomous assistant. Notes are stored as plain markdown files with YAML frontmatter in iCloud Drive, syncing seamlessly between Mac and iPhone with conflict detection. Hashy ships with a Claude Code skill so AI agents can read and write your vault directly from the terminal. Features include full-text search across your entire vault, tag-based filtering, keyboard shortcuts for everything, math rendering, and a keyboard accessory bar for quick formatting. Open source under the MIT license with no proprietary format or database lock-in.

Pricing: Free (BYOK for AI)

Minimum macOS: 14.0 (Sonoma)

Architecture: Apple Silicon

Key Features

Native SwiftUI app for macOS and iOS — not Electron, not a web view
AI chat panel with 11 tools that create, edit, search, and organize notes autonomously
Bring your own API key — OpenRouter, OpenAI, or Anthropic with pay-per-use pricing
Support for Claude Opus 4.6, Sonnet 4.5, GPT-5.2, Gemini, DeepSeek, Grok, and more
Plain markdown files with YAML frontmatter — no proprietary format or lock-in
iCloud sync between Mac and iPhone with conflict detection
Built-in Claude Code skill for AI agents to read and write your vault from the terminal
Full-text search across your entire vault with tag-based filtering
Keyboard shortcuts for tasks, text formatting, and navigation
Math rendering and keyboard accessory bar for quick access to headings, tasks, and code blocks
Open source under MIT license