Paid for is to replace messages because I hate how messages separates friends and message window. But I feel like I've been cheated out of 10$ because it says

Paid for is to replace messages because I hate how messages separates friends and message window. But I feel like I've been cheated out of 10$ because it says its compatible with Messages, but after I bought it I find out I can't add my Apple account and talk with all my friends who have ios devices, so exactly how he can claim its compatible with Messages is beyond me.