WatchSync — for JioHotstar · Last updated: 27 June 2026
WatchSync lets friends watch the same title on Hotstar / JioHotstar in sync, with chat and emoji reactions. In short: no accounts, no analytics, no ads, no tracking, and nothing is sold. The extension only relays small "watch-together" control messages between you and the friends you invite.
The extension saves a small amount of state locally (browser
storage.local) that never leaves your computer except
as described below: your chosen display name, the current
room code and server URL, and whether a party is
active (to reconnect after a reload). Leave the party or remove
the extension to clear it.
While you are in a party, the extension connects to a sync relay and sends these messages, which the server forwards only to other members of your room:
The server does not store any of this. Messages are held in memory only long enough to forward them to the other people in your room, then discarded. Nothing is written to a database; message contents and member names are not written to server logs. The server keeps only transient, in-memory room membership and may log anonymous room-occupancy counts for health.
storage — remember your party so it survives reloads.activeTab — read the active tab's URL only when you click the
extension, to build a shareable invite link.hotstar.com / jiohotstar.com — run the
in-page sync overlay and hook the video player on those sites only.The default sync relay is operated by Kushagra Agarwal at
wss://party.kush.wtf. The relay is open source; anyone can run their
own and point the extension at it.
There is nothing stored server-side to retain or delete. To remove all local data, leave the party and uninstall the extension.
Questions or requests: agarwalkush27@gmail.com