The app is not completely anonymous and you can choose to show your original profile.
However, if you want to hide that you can do that in settings and hide your picture, name, and other personal details.
Wakie works well and has an active community of awesome people.
Reddit is probably the biggest community on the Internet where you can talk about virtually any topic.
Bored of talking to your friends on Facebook and Whats App? Sometimes talking to strangers can be really beneficial to your mind.