Your chats stay yours.
After setup, Loci answers on-device. Your prompts aren't sent to a server, tied to an account, or kept in a log somewhere. The private things stay private.
More on privacy → Private · Offline · On-device
Free AI that never leaves your device.
Loci runs powerful AI right on your Android phone, iPhone, iPad, Mac, and Windows PC. Your conversations stay with you — private by design, and ready even with no signal.
on the App Store no account, no ads, free.
Running on this device
Completely private
Way better for the environment
Works in airplane mode
No account Open the app and start. Nothing to sign up for.
No ad tracking No tracking cookies, ad pixels, or data sale.
Stays on device Your words are answered where you typed them.
Free No subscription, no paywall, no upsell.
Why Loci
Three promises, built into the architecture.
Not settings you switch on. They follow from where the model lives — your device, instead of someone else's server.
Works with no signal.
Download a model once on Wi-Fi. After that, Loci keeps working mid-flight, in dead zones, and in the middle of nowhere — wherever you actually need it.
More on offline use →Kinder to the planet.
Everyday answers skip the round trip to the data center, using the efficient chip already in your hand. Less energy, no cloud — quietly greener AI.
More on energy → How it works
Cloud AI takes the long way around.
It routes every question through power-hungry data centers before it can answer. Loci runs the model on your device — so none of your chats ever leave it.
Cloud AI
Ask → network → data centers → back
A long round trip, off your device →
Loci
Ask → on-device model → answer
✓ Your chats never leave the device
In your hand
Genuinely useful, right out of the box.
A real assistant for the everyday — and for the moments when there's no connection to fall back on.
When it counts
Ready when everything else isn't.
The moments you most need a clear answer tend to come with no bars. Loci doesn't need a network to think — so when things get remote, turbulent, or dark, there's still a capable guide in your pocket.
- Remote & off-gridTrails, cabins, open water — no coverage required.
- Travel & airplane modeLong flights and trips without a local SIM.
- Outages & emergenciesWhen power or service fails — calm, clear, useful.
Our mission
Intelligence should be a public good.
We built Loci to put capable AI in everyone's hands — without the massive energy of the data-center model, and without charging people for intelligence. We think it belongs closer to a public utility than a product with a price tag. So Loci is free, with nothing to sell.
$0Free to use
Common questions
Asked and answered.
Is Loci really free?
Yes. Loci is free to download and use on Android, iPhone, iPad, Mac, and Windows. There are no subscriptions, no ads, and nothing to unlock.
Does Loci work without internet?
Yes. Download a model once over Wi-Fi and typed chat keeps working with no connection at all — in airplane mode, abroad, or in dead zones. Model downloads, optional web search, and Windows online voice input need a connection when you use them.
Are my conversations private?
Yes. Chat is processed on your device and is not uploaded. There is no account, no server-side copy of your conversations, and no training on your words.
Which AI models does Loci run?
Loci can chat with Apple's built-in foundation model or download from 10+ curated open-source models, including Gemma, Qwen, Llama, and Phi — all running locally on your device.
Free with no ads — what's the catch?
There isn't one. Loci runs open-source models on the chip already in your device, so there are no server bills to pass on to you. We don't sell ads, and we can't see your conversations — they never reach us. We built Loci because we think capable AI should be a public good.
Bring AI home.
Free to download for Android, iPhone, iPad, Mac, and Windows. No account, no signal, no strings.