A free program for Android, by マッチンgooチーム.

Matchon GOO is an anonymous chat app where you can meet people with the same interests as you. You can do so with the help of the matchmaker function, which will find people in your area based on the information you provide. Once you’ve found a match, you can start chatting. There is no limit on how many times you can chat per day, so you can meet a lot of new people. If you find that you like someone, you can give them a heart. Hearts are used to show affection and appreciation, so if you like someone, you can show them your heart. Hearts can also be used to express your desires, so if you like someone, you can tell them how you feel.