Knock Knock: Friends Next Door
See what friends are up to
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Your best friends, right next door. Knock on their door whenever you miss them, and when they knock, open up and share what's in front of you.
Be neighbors with your friends, and knock when you miss them.
Knock Knock is a small app for sharing everyday life with your closest friends. Invite friends to be your neighbors, and drop by their door anytime, no matter how far apart you are.
Miss them? Knock knock
Knock on a friend's door in your own rhythm to let them know you're thinking of them right now.
Open the door and share the moment
When someone knocks, answer with the view in front of you, a peephole selfie, or your latest photo.
Apart, but in the same photo
Got a photo or video from a friend? Take a photo together with it!
Pin your days to your door
Pick a few recent photos to decorate your door. When friends drop by, they'll see what you've been up to.
Keep your friends' doors on your Home Screen
Add the widget to put your friends' doors and door photos on your Home Screen. Tap it to go straight to their door.
Terms of Service: https://knock-api.5lab.app/user-agreement.html
Privacy Policy: https://knock-api.5lab.app/privacy-policy.html
Ratings & Reviews
- Added support for English, Traditional Chinese, Japanese and Korean
- Added a crayon outline effect for group photos
The developer, Mediocre Apps, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 2.5 HK LIMITED
- Size
- 166.4 MB
- Category
- Social Networking
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
English and 4 more
- English, Japanese, Korean, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 2.5 HK LIMITED