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Mobile App Showcase

Sparq

1,000,000+ Installs on Google Play

Sparq (formerly Random Chat) connects you to millions of friendly strangers worldwide for one-on-one text and media chats. Built with high-speed WebSockets and local SQLite storage for lightning-fast loads.

  • Zero Registration Required

    Open the app and connect to a partner instantly.

  • Real-time Translations

    Type in your native tongue; the app translates instantly.

  • Safe and Moderated

    Advanced auto-moderation sweeps out inappropriate content.

Download on Google Play Request Custom Chat App
Sparq WebSimulator v1.0
Disconnected

Ready to simulate?

Test the Sparq mobile app experience right in your web browser. Click below to look for a random stranger.

Under the Hood

Architecture & Features.

WebSocket Connection Pool.

Strangers are paired using a low-latency Node.js matchmaking server. Once connected, message distribution happens in sub-50ms using optimized WebSocket clusters.

// Low-latency match routing
const partner = getAvailablePartner(user.id);
if (partner) {
  activeRooms.set(roomId, [user.id, partner.id]);
  sendTo(partner.id, 'match_connected', { roomId, partnerCountry });
}

Real-time Translation Pipeline.

Messages pass through an inline lightweight translation worker. Users can read messages translated instantly to their configured phone language.

// Instant message translate event
socket.on('msg', async (data) => {
  const translated = await translateWorker.translate(data.text, data.toLang);
  io.to(data.roomId).emit('msg_incoming', { text: translated });
});