Knock. Use your iPhone as a password for your Mac.

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What just happened

Here's that again

Your Mac

Your iPhone

Unlocked over

Super secure

Low power


All you do is

Get the iPhone app for the introductory price of $3.99.

Introducing Knock 2.0

Knock and Apple Watch are a match made in heaven. Knock 2.0 takes full advantage of Apple Watch, making unlocking your Mac faster and more secure than ever before. When you put on your Apple Watch, Touch ID will ask for your fingerprint. After that, you can unlock your Mac from your wrist with just one tap – no Touch ID required! It’s all the security of two-factor authentication, but all the convenience of Knock.

A faster, safer way to sign in.

You keep your iPhone with you all the time. Now you can use it as a password. You never have to open the app— just knock on your phone twice, even when it’s in your pocket, and you're in.

What if my phone is lost or stolen?

Stolen phone-proof

Lost or stolen phone? Simply sign in with your old-fashioned password and disable your iPhone with one click.

Hassle-free for you, and your battery.

Using Knock won't drain your iPhone's battery, even if you use it all day every day. Knock securely communicates with your Mac using Bluetooth Low Energy, a new technology that draws very little power.

Why should I bother locking my Mac?

This world be crazy

Did you know that an average person with no technical skills can get all of your usernames and passwords in less than 30 seconds, without doing anything illegal? See how


Knock works with all new Macs

and the iPhone 6, 6 Plus, 5S, 5C, 5 & 4S

  • 2011 MacBook Air or newer
  • 2012 MacBook Pro or newer
  • 2012 iMac or newer
  • 2011 Mac mini or newer
  • 2013 Mac Pro

Thanks for downloading Knock.
We think you're going to love it.