Hi Knock Knock 與 BLACKBOOK JOURNAL 使用情況與統計

Knock knock! Who’s there? It’s us, HiKnockKnock, delivering kind private messages for you to the people you care about. We help you make someone’s day a little better! Choose a message and we send it for you, all while keeping your privacy secure. With lots of message categories to choose from, finding just the right message to send is easy. It feels good to give without expectation and of course, it feels good to receive too! Let’s spread some kindness together… Join in on the fun and pay it forward! *Note: Sending messages require additional in-app purchases.