Hearth AI - On-Device AI

Run AI models 100% on your device. No cloud, no account, no data collection.

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