Wyndup
wyndup.netYou control the timer on your device. They see it live on theirs.
Utilitiestimerlive-syncpresentationsspeaker-toolsno-signupbrowser-based

About
Wyndup is a free, browser-based live timer tool for speakers and timekeepers. A timekeeper sets a duration and receives a 4-digit code, which the speaker enters on wyndup.net to see the countdown in real time on their own device. No app download or sign-in is required, and it works on any mobile browser.
Problem
Speakers and timekeepers need a simple way to share a live countdown without requiring an app, account, or shared screen.
For
event speakers and timekeepers at in-person or online events
How it works
The timekeeper sets a duration and shares a 4-digit code; the speaker enters the code on wyndup.net and instantly sees the synchronized countdown on their own device.
Business model
free
Status
launched