I use Obsidian for my PKM system of connected notes based on Linking Your Thinking (LYT) and Ideaverse for Obsidian.

It works with Markdown (plain text) files in a local vault on my iMac (macOS) and syncs with Obsidian Mobile on my iPhone (iOS). This amazing app unleashes my thinking with key features for making notes and maps, linking and integration, journaling, ideas and knowledge, visual canvas and graphs, and extensive plugins for templates, dataview queries, periodic notes, and note refactoring.

Sharpen your thinking. Obsidian is the private and flexible writing app that adapts to the way you think.

Introduction

• Obsidian – Website – Download the free app

Learn

• Obsidian for Beginners – Learn basics: Markdown, Linking, Hotkeys, Settings, Themes (free)
• Ideaverse for Obsidian – Download starter kit for your PKM system (free)
• Obsidian Flight School – Make notes at the speed of thought ($)

Integration

• Obsidian – Settings
• Arc – Obsidian