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Second Brain is an AI memory companion for iOS that models how your mind actually works.
Capture thoughts by text or voice. AI classifies each memory into three layers — instant, short-term, and long-term — extracts tags, and generates summaries. No folders, no manual sorting.
Ask questions like "What did Sarah say last week?" and get answers from your own memories via semantic search.
Weekly AI reflections find patterns in your thinking you missed. Free with limits, Pro at $4.99/mo.
Second BrainYour AI memory companion that captures, connects & recalls
Lemon Xieleft a comment
Hey Product Hunt! 👋 I'm Liwei, a solo developer based in Finland. I built Second Brain because I kept losing ideas, forgetting promises, and never revisiting my own notes. The problem isn't capturing — it's recalling. I have hundreds of notes scattered across apps that I'll never look at again. I wanted something that actually thinks with me. The core idea is to mirror how human memory works: -...
Second BrainYour AI memory companion that captures, connects & recalls