What's New

Bug fixes and performance improvements

App Description

Instantly see who's around - just by knocking twice on your phone! Knock Knock let's you see people nearby and then connect them into a group. Its the easiest way to set up a group chat on the fly.

*** “Knock Knock, who's there? An app that's about to take over our social lives.” -MTV

Group chats are 100% free and allow for your crew to connect fast, whether for a study group or a night out. Join or leave any group any time, share your social handles and contact info or just chat, plus send photos, locations, and enjoy the fun of connecting friends, acquaintances and strangers all in one place.


* CONNECT INSTANTLY with anyone nearby. Just knock twice.
* 100% FREE GROUP MESSAGING: Knock Knock is completely free to use.
* SHARE moments and stay connected without ever having to give your number away.
* AND MUCH MORE: Knock Knock is like Shazam for people. See everyone nearby, check out mutual friends, create or join groups, and exchange contact info/social networks.


* Knock Knock is now available nationwide within the US! Anyone with a .edu email can sign up and start Knocking.
* Streamlined group creation - add anyone to groups using @tags. Drill into any group to see all the members and connect outside the group chat.
* Mutual Friends - Its a small world. See how many mutual friends you have with anyone on the app directly from the discovery screen, then check out their profile to see who you know in common.
* Best new interface ever!

System Requirements:
iOS 8.0 or above, optimized for iPhone 5 and higher.

We want to hear your feedback!
Email: [email protected] (mailto:[email protected])
Facebook: www.facebook.com/knockknockwhosthereapp/ (http://www.facebook.com/knockknockwhosthereapp/)
Insta: https://instagram.com/knockknockapp/
Twitter: https://twitter.com/knockknockapp

Note: Continued use of GPS running in the background can dramatically decrease battery life.

iPhone Screenshots

(click to enlarge)

Knock Knock - Group Chat w/ People Nearby screenshot 1 Knock Knock - Group Chat w/ People Nearby screenshot 2 Knock Knock - Group Chat w/ People Nearby screenshot 3 Knock Knock - Group Chat w/ People Nearby screenshot 4 Knock Knock - Group Chat w/ People Nearby screenshot 5

App Changes

  • May 07, 2015 Initial release
  • June 08, 2015 New version 1.0.3
  • June 11, 2015 New version 1.0.4
  • July 04, 2015 New version 1.0.5
  • July 11, 2015 New version 1.0.6
  • August 06, 2015 New version 1.0.9
  • August 19, 2015 New version 1.1.0
  • August 20, 2015 New version 1.1.1
  • September 13, 2015 New version 1.1.2
  • September 20, 2015 New version 1.1.3
  • September 25, 2015 New version 1.1.4
  • November 03, 2015 New version 2.0.1
  • December 19, 2015 New version 2.0.2
  • January 16, 2016 New version 2.0.3

Other Apps From Humin, Inc

Humin - Phone and Contacts App