Wow, talk about a product that is not on my radar. Right now, I'm too geographically constrained to find it useful (it takes too long to casually meet up with friends), and in New York, we all just group texted each other. I guess this is nice in comparison to mass text/email (I'm speculating since I don't have the app) in that when one person replies "Yes!" or worse, "No", not everyone has to get that message. And right now, Facebook Events seem too formal a mechanism for setting up casual meetups. I could see that differentiation making a product...but how did it reach a critical mass?

It's funny that the article mentions that the app can be used for invitations to a variety of events, "even a church service". This sounds like the kind of app that would seemingly have originated from a church community. A lot of people go to megachurches for the daytime social networking, and stay loyal through small groups (Bible study, recreational sports, etc)...while it's often joked that this serves as a dating service for Christian singles, there's a lot of eagerness for platonic casual meetups, or just wondering if anyone is going to go to Wednesday night service this week. If a pastor recommended his 10,000 congregants to use an app to best stay in touch...I'd think that its adoption would spread very quickly...and the church-going crowd is still a big sector in America.