[efitz]

I really like the usage here. I would love to generalize the app to find people hunting and setting off fireworks at impolite times.

Why did you use pixels on a map image for location, instead of GPS? Phones have GPS these days. You could have a simple app where you push the button when you hear the noise, it reports to a cloud function, and instantly triangulates and throws a point on your favorite map program.

[fwip]

Writing an app and deploying it to three different devices seems like a lot of complexity, compared to a clock, a pen, and a piece of paper.