Smart AI, Zero Surveillance
Sathi uses AI to understand you — but your data never leaves your phone unless absolutely necessary. Conversations stay encrypted on-device. The AI proxy stores nothing. Token budgets cap what the AI sees. No analytics, no ads, no tracking. And you can delete everything with one tap.
How Data Flows — And Doesn't
What We Promise
Encrypted On-Device Database
All your data — conversations, tasks, expenses, memories — lives in an encrypted Realm database on your phone. A 64-byte encryption key protects it. Even with physical device access, the data is unreadable without the key.
Stateless AI Proxy
The server that talks to the LLM stores nothing. No conversation history, no user profiles, no files. It takes your request, forwards it to the AI, returns the response, and forgets everything. Rate limiting is the only state it holds.
Token Budget Enforcement
Every AI request is capped at 3,000 tokens. Your current message gets 500. Short-term memory gets 400. Long-term memory gets 500. Feature context gets 400. This means the AI sees the minimum needed to help you — not your entire life story.
Hybrid Intent Parser
Clear commands ("add task", "₹200 grocery") are parsed entirely on-device using regex — no network call. Only ambiguous or mixed-language inputs reach the LLM. Most interactions never leave your phone.
Zero Analytics & Tracking
No Google Analytics. No Firebase Analytics. No Mixpanel. No ad SDKs. No tracking pixels. Your usage patterns are computed locally by the behavior learning engine and never transmitted anywhere.
Delete Everything, Instantly
One tap in Settings wipes all data — conversations, tasks, voice profile, memories, everything. No confirmation emails, no 30-day retention, no hidden backups. When you delete, it's gone.
What the AI Actually Sees
Every request to the AI is capped at 3,000 tokens. Here is how that budget is divided:
System Prompt
Persona instructions injected by the proxy — tells the AI how to behave.
Long-term Memory
Compressed summary of your profile and preferences. Not raw conversations.
Short-term Memory
Recent session context — what you talked about in the last few exchanges.
Feature Context
Today's tasks, expenses, wellness — hydrated from your local database.
Current Message
Your actual message, plus a response style instruction.
Reserve
JSON overhead, margin for mixed-language text expansion.
Privacy Isn't a Feature. It's the Foundation.
Download VivaLyn Sathi and experience AI that respects your data.