Step 1
Stay present
You keep the app ready while living normally — commuting, going out, or spending time with friends.
How it works
A privacy-first system for reconnecting after real-world proximity.
Serendipity is built around a simple idea: help people rediscover meaningful encounters without exposing where anyone is or creating a location trail.
The app can stay active while you move through normal life. When two users are close enough, their phones can exchange anonymous Bluetooth Low Energy identifiers. Those identifiers rotate, which helps prevent anyone from turning a broadcast into a stable, trackable identity.
Later, Serendipity can translate those private encounters into possible matches. Users can review the people they crossed paths with, express interest, and only learn more when that interest is mutual.
Reconnect after proximity, not by exposing location.
- Real-world context first.
- Bluetooth proximity over GPS location.
- Short-lived signals for live moments.
- Mutual matches before identity reveal.
Step by step
What happens from first proximity to final match.
Step 2
Private proximity detection
Nearby users can be detected via BLE. The system is proximity-aware, not map-aware.
Step 3
Choose your moment
Send a live wink if the timing is right, or revisit the encounter later with passive matching.
Step 4
Reveal only on mutual interest
The social layer activates only when both people opt in. Until then, nobody can use the app to find or follow someone.
Technical model
Inspired by trust-preserving proximity systems.
Serendipity's privacy approach takes cues from exposure-notification-style cryptography: rotating identifiers, limited exposure, and careful separation between proximity and identity.
What it uses
- Bluetooth Low Energy for nearby-device awareness.
- Rotating anonymous identifiers instead of a persistent beacon.
- Mutual-action logic before any identity reveal.
What it does not use
- No always-on GPS history.
- No map of nearby strangers.
- No way for one user to track another through the system.
Take the second chance
Curious about the product?
Read more about the mission, explore the privacy model, or join the waitlist to hear when Serendipity is ready.