Hobbies
I added the RetailMeNot and Yelp apps, I guess mainly because my "hobby" is not wasting money. So I get coupons w/ RetailMeNot, and I get reviews for restaurants on Yelp. We rarely go out to dinner, so when we do, I do my homework first so we aren't likely to be disappointed!
Like probably a lot of people (no time to read everyone's blogs anymore! Darnit!), I checked out our library's reviews on Yelp. It was pretty heartwarming because it looks like we are beloved among at least those reviewers. (I'm curious where in the world the person really was who raved about CCPL's fireplace??? I would sure love to have one, but I'm pretty sure we don't.)
I also have the Ibotta app. I've got it all set up, and I have rebates on there, but again, I'm hamstrung in using it at the actual store because I have such limited data. It would probably be fun and productive (and even addictive) if I could use it offline. It sure would be nice if my Kroger (and Wal-Mart, and Target) had free wi-fi.