Phos means light. Yours stays yours.

Private local AI you can be honest with.

Phos helps you think through messy decisions, write difficult messages, study privately, and shape ideas without turning your inner life into someone else's data trail.

Download Phos Free

Open the app. Start thinking in seconds.

Phos app home screen showing quick starts and mascot
Phos mascot
No company cloud for private dataNo account requiredNo ads or purchases in V1No trackingPublic on GitHub
Phos means light

Not a spotlight.
A lamp on your desk.

Phos is named after light because the product should do one quiet thing well: help you see your own thoughts more clearly, without making them public property.

Catch the thoughtOpen Phos before the idea disappears, while it is still messy and honest.
Keep the room privatePhos tries the local path first, then makes any outside boundary visible when you configure one.
Leave with clarityTurn the fog into a draft, a decision, a study plan, or the next step.
Phos mascot greeting

Tiny private ritual

Write what you cannot say out loud yet. Let Phos help you make it clearer.

mode

Local-first

memory

Only when saved

Built for real thoughts

For the thoughts you would not paste into a normal chatbot.

Late-night replies, private study notes, startup ideas, and personal decisions. Phos gives them a quiet place before they become someone else's training data, dashboard event, or ad profile.

Listening mascot

Companion

listening locally

No account. No tracking.

I need to say this honestly without sounding harsh.

Phos response

Phos keeps the feeling intact, removes the sharp edges, and gives you a draft you can actually send.

Save as memory
Continue in chat
Make it shorter
Turn into steps
Happy Phos mascot
Thinking Phos mascot

Yourunfinishedthoughtsdeserveaquietplace.Phosstartswithlocal-firstprivacy,noaccount,noads,notracking,andmemoryyouapproveyourself.Theapphandlesthetechnicalpathquietly.Localmodel,ownkey,orlocalserver,theboundarystaysvisiblebeforeprivatecontextmoves.

The Companion Manifesto
Phos interactive app playground

See the real boundaries

A closer look at what Phos handles quietly: local setup, provider boundaries, local tools, memory, app logs, screenshot cover, and generation settings.

Active setup preview
Running locally with a downloaded model

Chats, memories, and selected local model metadata stay on this device. No company-hosted inference is involved.

Local mode

Built around how you actually think.

Not another chatbot wrapper. Phos is a private thinking space designed around real workflows.

Private by default

Conversations that stay yours.

Ask about private notes, startup ideas, study questions, or a difficult message. Phos handles the local setup and shows when a provider key or local server is being used.

Private chat screenshot
Your Companion

Always alive. Always yours.

Meet Companion, a quiet presence that reflects real app states: listening, thinking, responding, recalling, locked, or offline.
Mascot status
Guided workflows

Start thinking in one tap.

Quick Starts give you structured templates for what you actually need, without prompt engineering.
Think through
Draft message
Study guides
Plan day
Auto local setup

Your models. Your rules.

Phos scans the device, prefers a stable local path automatically, and keeps power-user options for own keys or local servers when they are configured. Normal users do not have to choose model formats first.
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No ads. No tracking.

The privacy controls are visible.

App Lock, Screenshot Cover, App Logs, and key storage are surfaced in the app instead of hidden behind vague privacy copy. Full database encryption remains a future hardening step.

Screenshot Cover

Optional secure-window privacy cover

User controlled

App Logs

Local diagnostic hints, user-triggered reports

No tracking

App Lock

Biometric or passphrase gate

Optional
Nothing hidden

Public code. Private thoughts.

Phos does not need a trust-me sales pitch. The app is public, the boundaries are visible, and the default experience is built around no account and no company storage for private data.

Trust receiptV1
No login wall
No ads in V1
No tracking
No in-app purchases in V1
No company cloud for private chats
Public source, public issues, public roadmap
View the public repo

What happens under the hood

Phos handles the setup. You see the boundary.

Automatic local setup

Phone first

Phos recommends and loads the best available local path for the device. Normal users do not have to pick file formats first.

Own-key fallback

Your provider

When a provider key is active, Phos keeps the key locally and makes it clear that the request uses that provider.

Local server bridge

Your endpoint

When a local endpoint is configured, Phos becomes the mobile interface to the server you run on your own network.

Set up in 30 seconds.

No login. No signup form. No credit card. Just open the app and start thinking. It's that simple.

Phos onboarding screen, no login required
Phos celebrating

Start thinking clearly.

A private, local AI companion for the thoughts you don't want on someone else's server.

Free, public source, no login, no ads, no tracking, and no purchases.