ThinkerNotes

ThinkerNotes is an aesthetic notes tool. A personal knowledge tool for solo founders that captures what you concluded from books, podcasts and customer calls in your own words, links related ideas, and resurfaces old notes when they become relevant again.

ThinkerNotes is a note tool for solo founders and operators who read, listen and talk to customers constantly, then lose most of what they learned within a few months. The premise is narrow on purpose: generic summaries are cheap and infinite now, but the conclusion you drew from a pricing book or a churn call is specific to your business and exists nowhere else. ThinkerNotes stores that conclusion in your own words and resurfaces it when a new situation touches the same idea. The workflow is deliberately light. You capture a draft as one line, with no title, folder or tagging decision to make. Later you return and sharpen it into an insight, adding the context and trimming it to the point you actually want to make. The product then surfaces older notes that appear related, and you choose which links genuinely belong. Sources stay attached, so a note can point back to the book, podcast, newsletter or article it came from, and Kindle highlights can be imported and rewritten as your own conclusions. Retrieval is the part that separates it from a filing cabinet. Search works on meaning rather than exact wording, so describing the shape of a half remembered idea can bring the note back. Old insights also return unprompted in the context of current work. A connection layer over MCP lets Claude or another agent read your insights when you ask about a topic, with read only access: the model cannot write into your notes. The stated design choice is that the tool finds connections but never generates your thinking or turns your notes into content. Compared with Notion or Obsidian, the difference is reminding rather than storing. Those tools hold notes well but rarely bring one back unasked. Against highlight apps, the unit here is what you concluded rather than what the author wrote. The honest limit is scale and scope: it is one developer's product, aimed at individuals rather than teams, with the free tier capped at 100 notes.