Aloha Voice Chat is an interesting social app kind of like Omegle or Chatroulette, although in this case, instead of written text and webcams, you'll be communicating by voice.
The way Aloha Voice Chat works couldn't be easier. On its main page, simply drag your finger up to start a conversation with a random user who also happens to be online at that moment. From the settings, you can choose your main language, which limits the number of users you can chat with but also means your ability to communicate will be much better.
Depending on how long you chat and how much you and the other person participate, you can earn coins that you can use to buy privileges, like the ability to choose your conversation partner's gender.
Aloha Voice Chat is a fun app that's particularly good for staying entertained on boring days when you want to kill a little time talking about random topics with a stranger.