Talk, Don't Type. Your AI Companion Listens.
VivaLyn Sathi is designed around your voice. No tiny keyboards, no confusing menus — just speak naturally in Hindi, English, or any of 6 Indian languages, and your AI companion listens, understands, and responds. Built for seniors, busy professionals, and anyone who prefers speaking over typing.
Tap. Speak. Done.
Your privacy matters. VivaLyn Sathi uses a simple tap-to-talk model — press the microphone, speak, and release. No wake word. No passive listening. No ambient audio capture. Your microphone is only active when you explicitly choose.
Tap-to-Talk, Not Always Listening
Press the microphone button, speak, and release. There is no wake word, no passive listening, and no ambient audio capture. Privacy first.
Intelligent Speech Recognition
OpenAI Whisper model with Indian accent support. Understands Hindi, English, Bengali, Tamil, Telugu, Marathi — and natural code-mixing between languages.
Automatic Silence Detection
After 1.5 seconds of silence, recording stops automatically and your message is sent. No need to tap again — the experience is natural and hands-free.
Sathi Speaks Back — In Your Language
Every AI response is spoken aloud using Microsoft Neural TTS voices specifically chosen for Indian languages. Not robotic text-to-speech — real native-speaker neural voices with natural prosody, rhythm, and intonation.
English
NeerjaNeural
Indian English accent
Hindi
SwaraNeural
Native Hindi voice
Bengali
TanishaaNeural
Native Bengali voice
Tamil
PallaviNeural
Native Tamil voice
Telugu
ShrutiNeural
Native Telugu voice
Marathi
AarohiNeural
Native Marathi voice
Five Voices. One AI. Your Choice.
Personalize how your AI companion sounds with five carefully tuned voice presets. Each includes fine-tuned prosody controls — speaking rate, pitch, and volume — so the voice feels natural, never robotic.
Default
Soft Indian voice for everyday use
Best for: Daily conversations
Calm & Soothing
Gentle, relaxing tone — 25% slower with lower pitch
Best for: Bedtime stories, wellness check-ins
Warm & Friendly
Like talking to a close friend
Best for: Casual chats, emotional support
Pleasant Indian
Clear, expressive Indian voice
Best for: General use with personality
Professional
Clear, confident, crisp pace
Best for: Task management, planning
Everything You Need, Just by Speaking
Create Tasks by Voice
"Remind me to call doctor tomorrow at 3 PM" — VivaLyn Sathi creates the task with smart defaults for time, priority, and reminders.
Log Expenses by Speaking
"Spent 500 rupees on groceries" — automatically categorised and tracked. No spreadsheets, no manual entry.
Voice-Guided Onboarding
Senior users receive spoken instructions at every step, making setup accessible to everyone regardless of literacy or tech experience.
Natural Conversation Mode
Have flowing conversations with AI that understands context from your previous chats. Share your day, ask questions, get advice.
Story Creation by Voice
Describe a story idea by speaking, and AI generates a personalised visual storyboard from your words.
Offline Voice Input
On-device speech recognition provides basic voice input even without internet. Your data and existing features remain accessible offline.
Technology That Doesn't Leave Anyone Behind
Voice-first design is a philosophy, not just a feature. For seniors who find small text difficult, users with limited literacy, or anyone who prefers speaking — VivaLyn Sathi makes AI genuinely accessible.
Voice Guidance at Every Step
Instructions are spoken aloud during onboarding, screen transitions, and key interactions. No one needs to read small print to use the app.
Large Text & Simple Navigation
Family Care persona mode uses larger fonts, slower speech, and simplified navigation designed specifically for elderly users.
Start Talking to Your AI Companion
Download VivaLyn Sathi and discover an AI that actually listens — in your language, at your pace, on your terms.