An app for friendship sounds too broad. I've tried meetup.com a few times, but all the events seem to take place while I'm at work (I'm pretty much night shift), so that didn't work out. I'd suggest finding a community that interests you, and looking for a local meetup.

For example, there are tons of video game forums out there, but if you focus on one game, the pool gets smaller, but more tight. I've met a few people IRL playing Destiny, and tons more online. Maybe someone else has more suggestions!