Loci - Private, Local AI

Loci is your private, local AI assistant that runs entirely on your device. No cloud. No subscriptions. No data leaves your phone.

POWERFUL ON-DEVICE AI Chat with Apple's built-in Foundation Model or download from 10+ curated open-source models including DeepSeek R1, Llama 4, Gemma 3n, Phi-4, and more. Every model runs locally on your iPhone's Neural Engine.

SMART TOOLS, NOT JUST CHAT Unlike basic chatbots, Loci gives AI real capabilities:

• Calculator that actually computes (no more wrong math)
• Date and time awareness
• Unit conversions
• iOS Reminders integration (create, edit, complete tasks)
• Calendar integration (view and create events)
• Web search via DuckDuckGo (on-demand, opt-in)
• Cross-session memory that remembers your preferences

VOICE CONVERSATION MODE Tap the waveform icon for a hands-free experience. Speak naturally, Loci responds aloud, and automatically listens for your next question. All speech processing happens on-device.

IMAGE UNDERSTANDING Attach photos and ask questions. Loci uses on-device vision to read text (OCR), classify scenes, and detect faces, then answers your questions with context.

APPLE SHORTCUTS INTEGRATION Use Loci in your Shortcuts automations. Ask questions, calculate, or convert units from any workflow.

PRIVACY FIRST Every conversation, every model inference, every tool call happens on your device. Loci works in airplane mode. Your data is yours alone.

FOCUS MODES Switch between General, Coding, Writing, Study Buddy, and Brainstorm modes to get specialized assistance tailored to your task.

DEVICE-SMART Loci detects your device's capabilities and recommends the best models for your hardware. No guesswork about what will run smoothly.

BETTER FOR THE PLANET Cloud-based AI services like ChatGPT and Claude consume enormous amounts of water and electricity to power and cool their data centers. Every query you send has an environmental cost. Loci runs entirely on your device’s existing hardware — zero data center usage, zero water consumption, zero additional carbon footprint. Powerful AI that’s also kind to the planet.