Here's a thing that happens on every team I've been on.

Sprint ends. Someone schedules the retro. Someone else shares a Miro link in Slack. Half the team opens it and immediately hits some kind of wall. "I'm on the viewer plan." "It's not loading for me." "How do I add a sticky note again?" One person accidentally deletes the entire frame. Another person is still zoomed into the wrong corner of the board and can't figure out how to get back.

We spend the first ten to fifteen minutes of every retro just fixing the board.

And the whole time I'm sitting there thinking: this is a sticky note board. This is the most ancient, simple, obvious tool in the history of meetings. How did we end up needing a tutorial to use it?

So I built something. It's called PostItUp. It's a real-time collaborative sticky note board that runs in the browser. It looks like an actual physical corkboard. Anyone can drop a note without creating an account. And the whole thing runs for free.