This year’s Worldwide Developers Conference starts on Monday, June 3. And we know that Apple, as usual, will be hosting its keynote speech to announce a variety of new changes and additions coming to its major platforms. One company wants to figure out which of those announcements is the most exciting for viewers.

The Apple Watch app company Cardiogram wants to use its app to measure heart rates of those watching the keynote speech at this year’s WWDC (via¬†AppleInsider). The goal? To figure out which of the announcements at the event get the most reaction from viewers, and ultimately determine which of the announcements was the most exciting.

To make it happen, Cardiogram will allow users to start recording their heart rate as soon as the keynote kicks off. The data collected is minute-by-minute, and will allow Cardiogram to compile that data and see how it all stacks up when the keynote comes to an end. There will be a live heart rate chart during the event, which will show the current collected heart rate of viewers as the announcements go on.

If it all works out, the theory goes that the heart rates will be higher just after a major announcement. Looking at the data, Cardiogram hopes that it can definitively say which announcement was the most exciting. Based on those who started tracking their heart rates, anyway.

The end result will be pretty interesting to see, especially considering how much Apple is going to announce at this year’s event. iOS 13, watchOS 6, tvOS 13, and macOS 10.15 are all expected to get new additions. And we can’t forget the anticipated modular Mac Pro, too.

If you don’t already have the Cardiogram app but want to install it just for science (and WWDC), it’s a free installation from the App Store.

What are you looking forward to most at this year’s WWDC?