# LocalBrain AI — On-device AI knowledge base > On-device AI knowledge base (iPhone/iPad app by YI-HONG Lin.) - Source: https://appshunter.io/ios/app/localbrain-ai/id6768289881 (this page in markdown: same URL + `.md`) - Developer: [YI-HONG Lin](https://appshunter.io/developer/597293723) - Category: Productivity, Reference - Price: Free with in-app purchases - Age rating: 17+ - Requires: iOS 26.0 · 36 MB - Languages: English, Japanese, Korean, Chinese, Chinese - Released: 2026-05-24 - Data updated: 2026-06-25 - User reviews in markdown: https://appshunter.io/ios/app/localbrain-ai/id6768289881/reviews.md ## What is 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. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | LocalBrain Pro | $19.99 | one-time | ## Version history (last 3 releases) ### 1.0.2 — 2026-06-05 This update makes your second brain even better at finding answers: • Web lookup: Need up-to-date info? Tap "Search the web" to pull answers from free public sources in real time, complete with citations you can verify — and save anything useful to your knowledge base in one tap. Everything runs on-device by default; it only goes online when you tap. • Organize pasted text: Drop in a messy block of text and get clear, structured key points, cross-referenced with your existing notes. • Full-text search: Quickly search past conversations and notes to find what you had in mind. • Sourced answers: Whether an answer comes from your knowledge base or the model's own knowledge, it's clearly labeled. • Pick up where you left off: Switch to another app or webpage briefly and come back — your conversation continues instead of starting over every time. • Refinements: Long answers are no longer cut off mid-sentence, plus localization fixes across languages. Thanks for using LocalBrain — we'd love to hear your feedback. ### 1.0.1 — 2026-05-28 1. Now free to use — 3 chat questions per day. 2. Various bug fixes. ### 1.0 — 2026-05-24 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*