An app that alerts you to potentially suicidal tweets from the people you follow on Twitter raises ethical and even legal questions. 

Specifically, an app to allow you to talk to one guy named Ethan. 

The data revolution is upon us, folks, and we are using it to shame our neighbors for wasting water during a drought. 

It really isn't very helpful. 

This week, the tech press did backflips over an app called "Yo." It's a messaging app that allows users to text the word "Yo." Nothing else. Just the word "Yo." Let that sink in for a second before we move on.

It was heralded as genius. it was derided as stupid. It was the subject of a conversation about meaning and subtext in online communication. It was given the avant garde treatment it deserved. Disregarding what was written about it, yo has cornered the internet's fickle attention long enough to enter the top 10 in the App store. By any metric, that's a victory.

We didn't write about it. Mostly because we thought there wasn't much to say that hadn't already been said. I think I acknowledged its existence on my twitter feed. Yo.

Hemingway is a new app that invites you to submit your writing into a text box where it'll be graded based on it's Hemingway-esqueness. 

Smartphone apps are big business, and increasingly complicated to develop. WNYC producer Jody Avirgan talks with Rekha Murthy of PRX and Lisa Bettany of Camera+ about what it takes to get one made -- and pitches his idea for an app to Bob and Brooke.