The first thing you need to decide is your commitment level. As in, how much do you want to pay to make your heart go pitter-patter? Some apps, like Plenty of Fish, let you view profiles and send messages for free. Most of the others let you view your potential matches without charging, but they make you pony up and subscribe if you want to actually reach out to them without limits—especially if the interest is one-sided. While the monthly charges for the apps we review here range in price from $10 to more than $40, most offer a discount if you commit to a long-term subscription, such as six months or a year. (You're not afraid of commitment, are you?)