It started on a rooftop.
In 2025, a group of friends in Hyderabad were on a rooftop with one small speaker and a question that wouldn't let go: every phone in this circle can play sound — why is only one of them?
Bluetooth was the wrong tool — it pairs with one device at a time. Streaming apps locked each person into solo listening. And a decent portable speaker cost more than most students could justify. So we spent three months prototyping how to sync audio across phones with sub-100ms precision — over a hotspot, with no internet — using the same Opus codec that powers WhatsApp calls.
When the first version played the same song across four phones at once, perfectly in sync, we knew we had something. LekSync is what that rooftop became: a free Android app that turns every phone in the room into a synchronized speaker. No cables, no subscriptions, no accounts required.