I didn’t know watermelon could do this.
If done in a controlled environment, it’s apparently very tasty! I recently stumbled upon a tutorial somebody made recently about how to make watermelon jerky with a dehydrator. Apparently the flavor gets significantly sweeter. He was making it for hiking/survival purposes, so removing all the water weight lets you pack a lot of lightweight nutrients, too.
Yep, mostly just used to help crowdsource weather reporting like this.
Though I have seen another interesting use-case for the barometer, which is for IP-rated (water-resistant) phones, you can use the barometer to check that your device still has a water-tight seal with an app that measures the pressure as you squeeze the sides of the phone together.