I made a little thing!
The good people over at caniuse.com provide a fantastic service allowing you to look up global browser support levels for any web feature you might want to use. Inspired by the fact that "Flexbox" is by far their most-searched-for feature, I thought I'd make a little shortcut to the web dev community's most burning question: Can I Use Flexbox?
Spoiler: the answer is yes.
You can find the app at unwitting.github.io/can-i-use-flexbox. It's fast, it's updated with fresh data from caniuse every day, and it'll always give you the answer you want.