What was on my phone?!?!

I'm so frustrated because yesterday one of my apps disappeared from my phone and now there's this gap where SOMETHING used to be.

The thing is I cannot remember WHAT THE HELL WAS THERE!. I've gone through all my apps and I can't figure out what it was! It's missing, and it's driving me crazy because I can't replace it because IDK What it is!

PS: My app says it's 71 and cloudy but when I took this screenshot there's not a damn cloud in the sky and it's gotta be in the 80's at least right now. Screw you, crappy weather app!