Hi Knock Knock vs BLACKBOOK JOURNAL Usage & Stats
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.
- Apple App Store
- Free
- Utilities
Store Rank
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BLACKBOOK JOURNAL ● is an app designed to help monitor the sensual experiences that matter the most to you. It's a powerful assistant that keeps detailed records while maintaining simplicity.
There’s enough structure to quickly jot down an experience, but open enough to let you fill in the details however you see fit.
- Apple App Store
- Free
- Utilities
Store Rank
- -
Hi Knock Knock VS. 
BLACKBOOK JOURNALJanuary 10, 2026