LocalBrain AI

LocalBrain is a fully offline, no-cloud personal knowledge base with an on-device AI knowledge-base assistant that helps you organize notes, answer questions, and rewrite ideas. Design principles • Fully on-device inference: your notes and queries never leave the device • No server, no account, no subscription, no ads • No analytics, no usage tracking Features • AI knowledge-base chat: ask in natural language, model answers only from what you've saved • Smart import: share URLs, PDFs, Word files to LocalBrain — content is automatically fetched and summarized • Linked knowledge-base pages: [[wikilinks]] automatically connect related notes into a graph Built for hoarders who never organize • Just toss it in: share URLs, files, or thoughts directly into LocalBrain — no folders, no tags, no system to set up first • No more organizing: the AI does the filing — extracts key points, builds knowledge-base pages, links related concepts via [[wikilinks]] • Your knowledge graph grows itself: every new import auto-links to existing notes, surfacing related concepts you'd otherwise forget • Just ask LocalBrain: find anything in your knowledge base by chatting — no need to remember where you put it or what it said Trusted for sensitive content • All data stays inside your iPhone sandbox — no server, no cloud sync, nowhere to leak from • On-device inference: your content is processed locally and never sent to any third-party cloud AI service • Use it for: private journals, password hints, client lists, draft financials, business strategy, product recipes Requirements • iPhone 14 or newer (A16 Bionic) • ~4 GB storage for the model • Wi-Fi recommended for first-launch model download (~3.4 GB) Privacy We do not collect personal data, do not upload analytics, do not send your queries to cloud AI services. All inference runs on your iPhone. See our privacy policy.