If you're strictly looking for a hookup app, it's always best to prioritize your privacy, and Pure does just that. The free app, designed to facilitate casual flings, erases your profile every hour (although you can easily restore it if your heart desires). The app is basically a geo-location-based online personals app that allows you to list yourself to other local singles for 60-minute periods to see who you match up with. If you mutually match, you can strike up a quick chat with the matching user, but be sure to exchange contact information quickly, as you'll lose contact on the app with that user. After one hour, your profile “self-destructs,” erasing your short online personal listing so nothing traces back to you.
One thing to note if you don't fall into the cis-hetero dating pool: While most of the apps reviewed here are inclusive, there are those that are friendlier to the LGBTQ community than others. For example, OkCupid goes beyond forcing users to choose between being a male or female, including options like Hijra, genderfluid, and two-spirit. If you're a man seeking a man or a woman seeking a woman, you'll want to steer clear of eharmony: It doesn't even give you the option of a same-sex match.