Interestingly, and probably because I'm a liberal, white Westerner, I hadn't even considered the impact prejudices (social class, race, religion, etc) make on who you might want to date. I just assumed that everyone who meets a few criteria and lives close by would be an option. To that end, an app makes a lot of sense.
But at the same time, maybe using an app will reinforce those prejudices, and that might not really be such a good thing.