The best AI note-taking apps, judged on whether they can find what you wrote
Notion AI, Evernote, Mem, Reflect, NotebookLM, Copilot, Capacities and Fathom compared on retrieval, training terms, export and price (2026-11-09).
Productivity Signal
Personal knowledge management
A knowledge system is only as good as its retrieval. These guides compare the tools, explain the cognitive offloading research, and show how to feed AI assistants from your own notes without losing the thinking.
Guides and analyses
Personal knowledge management: the guide, the evidence and the tools
Personal knowledge management explained: the capture-organise-retrieve loop, what memory research says about notes, and the tools for each working style.
Obsidian vs Notion: the comparison for how you actually think
Obsidian vs Notion for personal knowledge management: ownership, offline, export, encryption, AI training terms, 3-year cost and migration (2026-11-09).
How to build a second brain you will still use next year
The second brain method (CODE, PARA): what offloading research supports, what is folklore, why second brains die in month three, and how AI changes it.
The Zettelkasten method: how it works, the evidence and when not to bother
Luhmann's Zettelkasten as the archive shows it, what retrieval and spacing research supports, a minimal Obsidian or Notion setup, and when a folder wins.
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One topic a day from work, focus and AI, researched each morning and sent at about 8:30 Prague time, with its sources. No hype, one-click unsubscribe.