An AI That Truly Knows You
Most AI assistants forget everything the moment you close the app. VivaLyn Sathi is different. It remembers your conversations, understands your patterns, and builds a growing understanding of who you are — all while keeping this memory completely private on your device.
Two-Tier Memory Compression
A sophisticated system that balances personalisation with privacy. Your raw conversations stay on your phone — only compressed summaries power the AI's understanding of you.
Tier 1: Session Summaries
Short-term memory · ~200 tokens each
After each conversation session ends, the full exchange is compressed into a concise summary. This captures key topics discussed, emotions expressed, and decisions made — without retaining raw conversation. Session summaries accumulate over time, giving the AI rich context about your recent interactions.
Tier 2: Long-Term Summary
Rolling memory · ~500 tokens
Periodically, all session summaries merge into a single comprehensive long-term summary. This captures your personality traits, recurring themes (career stress, family health, financial planning), communication style, and long-term patterns. Old session summaries are pruned after merging.
Conversations That Build on Each Other
Personalised Conversations
The AI remembers you mentioned a doctor's appointment, that you've been stressed about work, or that your daughter's birthday is coming up. No need to repeat yourself — it picks up where you left off.
Emotional Continuity
The memory system tracks emotional tones across sessions. If you've been anxious recently, the AI adjusts — offering more reassurance, checking on your wellbeing, being more supportive.
AI-Generated Diary
Every day, Sathi can generate a personal diary entry based on your conversations — capturing highlights, emotions, and reflections in your language. A private journal you didn't have to write.
AI Enriched with Your Life Data
Beyond conversation memory, VivaLyn Sathi enriches every AI interaction with real data from your life — tasks, expenses, wellness, people, and medication.
Today's Tasks
The AI knows what's on your schedule and can reference upcoming deadlines naturally in conversation.
Expense Patterns
Aware of your budget and recent spending, enabling natural financial conversations and spending insights.
Wellness Signals
Mood trends, sleep quality, water intake, and exercise data inform wellness-related responses.
Known People
The AI remembers people you've mentioned — family, colleagues, friends — and uses this context naturally.
Medication Schedule
For senior users, the AI knows medication times and provides gentle reminders in conversation.
Emotional Timeline
Dominant emotions from each session build an emotional timeline that helps the AI be genuinely empathetic.
Your Memories Become Shareable Stories
Diary entries and conversations become the foundation for personalised AI stories. Select a date range, choose a mood, and Sathi generates a visual storyboard — a creative retelling of your experiences with narration and imagery.
Knows You Deeply. Tells No One.
Like having a friend with a great memory — except this friend can't gossip because the memories literally never leave your phone.
Raw Conversations Stay Local
Only compressed summaries are used for AI context. Full conversation text stays in your encrypted on-device database.
Summaries Never Leave Your Phone
Memory summaries are stored in your local database, not on any server. The AI inference request contains only summaries and the current message.
Opt-In Memory Consent
You choose whether the AI retains memory between sessions. Token budgets cap what's shared — strict limits ensure minimal data leaves your device.
An AI Companion That Remembers What Matters
Download VivaLyn Sathi and experience conversations that actually build on each other — with an AI that knows you, privately.