Your Data Never Leaves Your Phone. Period.
In a world where every AI assistant uploads your conversations to a corporate server, VivaLyn Sathi takes a radically different approach. Everything you say, write, and track stays on your device — encrypted, private, and under your control. Here's exactly how.
Privacy Isn't a Feature. It's the Foundation.
Most apps say "we take privacy seriously" and then collect everything. We went the other way — we designed an architecture where collecting data is technically impossible.
No Account Required
No email. No phone number. No sign-up. Download and start talking. We don't know who you are — and we designed it that way.
No Cloud Sync
Your diary entries, tasks, expenses, wellness data, and conversations are never uploaded to any cloud service. Everything lives on your phone.
Zero Data Monetisation
No advertising. No analytics. No "anonymised" data sharing. We have zero data on our servers, so there's literally nothing to monetise.
Stateless Server. On-Device Storage.
Here's the technical reality: when you speak to Sathi, your voice is converted to text on-device, sent to our AI for processing, and the response comes back. The server processes and immediately forgets — no logs, no storage, no retention. All personal context is stored in your phone's local SQLite database.
Voice → Text On-Device
Your voice is transcribed using on-device speech recognition. The audio never leaves the phone.
Text → AI (Stateless)
The transcribed text is sent to our AI along with conversation context. The server processes the request and returns a response. No data is stored.
Response → Phone Storage
The AI response — diary entry, task, expense — is stored in the phone's encrypted local database. The server has already forgotten.
Everything That Matters Stays Here.
Local SQLite Database
All data — conversations, diary, tasks, expenses, wellness, memories, medications — is stored in a local SQLite database on your phone.
Encrypted at Rest
The database is encrypted. Even if someone accesses your phone's file system, they can't read your data without the app's decryption key.
Voice Biometric Lock
Optional voice authentication adds another layer — sensitive sections like diary and finances are locked behind your voice print.
Things That Will Never Happen.
Track Your Behaviour
No analytics, no event tracking, no heatmaps, no A/B testing on your usage patterns.
Store Your Conversations
Our server is stateless. It processes your request and forgets. Conversation logs exist only on your phone.
Show You Ads
No advertisements. No sponsored content. No promoted recommendations. Ever.
Share Data with Third Parties
No data brokers, no marketing partners, no 'trusted' third parties. Your data is yours alone.
Require an Account
No email, no phone number, no OAuth. You remain completely anonymous to us.
Keep Data After Deletion
Delete the app and everything is gone. No server-side remnants. No backup copies.
AI That Respects You. Not Your Data.
Free to download. No accounts. No data sold. Private by architecture.