Your AI.
On your device.
Lochan is a private AI chat app that runs models right on your iPhone - offline by default, with no account and nothing sent to anyone else.
Answers that stream in.
See the whole conversation.
Private. Works offline.
Private by default
Your conversations stay on your device.
Lochan runs AI models directly on your iPhone and iPad. Use Apple's built-in on-device model, or download open models like Qwen, Gemma, and Llama and chat with them fully offline. No account. No cloud round-trip. Nothing sent anywhere.
One app, every model
Pick the right model for the moment.
Apple's built-in model
Instant and offline, right out of the box.
Open models
Download Qwen, Gemma, Llama, Phi, and SmolLM and run them on your terms.
Switch anytime
Change models per conversation, straight from the chat.
The river view
Conversations that branch, not overwrite.
Regenerate or edit any message to fork a new branch instead of losing the old one. Then pinch out to see the whole conversation as a flowing river - trunk, tributaries, and every path you explored - and tap to jump anywhere.
See, hear, and more
Understands more than text.
Attachments
Add images, PDFs, and text files and ask about them.
Read aloud
Hear replies in natural voices - pick the voice and speed.
Share without giving it away
Send a conversation, keep it private.
Lochan encrypts a conversation on your device before it ever leaves. We can't read it, and neither can anyone but the person you hand the link to. You preview exactly what's included, links expire automatically, and nothing is shared unless you choose to.
Built to feel good
Calm, fast, and crafted.
Smooth streaming
Answers arrive like a person typing.
Clean rendering
Markdown and code blocks, done right.
See the reasoning
Open the thinking view whenever you want it.
Alpine-forest theme
A calm design in light and dark.
Private AI, on your terms.
