Hearth AI - On-Device AI

Hearth AI brings powerful AI chat to your device — completely private, completely offline. 100% On-Device AI Run large language models directly on your iPhone, iPad, or Mac using Apple's Metal GPU acceleration. Your conversations never leave your device. No Account Required No sign-ups, no subscriptions, no cloud. Just download a model and start chatting. Browse & Download Models Explore a curated selection of open-source models from Hugging Face Hub, or browse the full catalog. Choose models that fit your device's capabilities — from lightweight 0.5B models to powerful 3B+ models. Smart Document Q&A Import documents and ask questions about them. Hearth AI chunks and indexes your documents locally for fast, relevant answers — all without sending your data anywhere. Conversation Memory Hearth AI remembers important details across conversations using on-device memory, making your experience more personal over time. Share Extension Share text and links from any app directly to Hearth AI for processing. Siri & Shortcuts Integrate Hearth AI into your workflows with App Intents support for Siri and Shortcuts. Your Data, Your Device - Zero data collection - No analytics or telemetry - No cloud processing - Works fully offline after downloading a model