we already have smartphones — and some of us even have
smartwatches. These tools can log you into your computer with a
smartphone or smartwatch.
The best, most polished options are available for Mac users with
iPhones. Solutions available for Windows and other platforms are much
more limited.
Mac and iPhone or Apple Watch
Mac users with iPhones have the most — and most polished — options available:
Knock allows you to use
either an iPhone or Apple Watch to unlock your Mac. Walk up to your Mac
with your iPhone on you and it will communicate with your Mac using Bluetooth Low Energy.
Knock on your phone’s screen — even if it’s just in your pocket, knock
on your pocket — and it will unlock your Mac. There’s no need to even
pull your phone out of your pocket, much less turn its screen on.
There’s now a Knock Apple Watch app for unlocking your Mac, which
provides some good security — if someone puts your watch on, they won’t
be able to authenticate and unlock your Mac. If someone grabs your phone
and you’ve set up Knock, however, they’ll be able to log into your Mac
unless you remotely disable Knock.
Knock costs $3.99 for the iPhone app. You’ll also need the Mac app installed on your Mac — that’s available for free.
Tether works entirely using
Bluetooth Low Energy. Walk up to your Mac and your iPhone and Mac will
establish a connection. Tether will automatically unlock your Mac when
you approach. Walk away from your Mac with your iPhone on you and Tether
will notice the iPhone is no longer in close proximity, automatically
locking your Mac for you.
There’s now a Tether Apple Watch app, too. One concern with this
solution is security — if you’re nearby your Mac in the same area, it
will automatically be unlocked. If someone grabs your phone, they can
approach your Mac and have it automatically unlock for them. It’s up to
you whether this is good enough security for your needs.
The Tether apps for both iPhone and Mac are free. Tether offers
in-app purchases for additional functionality, but the standard
auto-unlock and auto-lock features are free.
MacID takes a different approach.
Rather than automatically unlocking your Mac, it allows you to unlock
your Mac from your phone. This means you can use the Touch ID sensor on
your iPhone to authenticate and unlock your Mac.
As with Knock and Tether, MacID also offers an Apple Watch app.
Unlike with the above options, MacID can’t be used by just anyone who
has your iPhone and Mac. It requires a bit more work because you have to
actively log into your Mac via your phone, but that may be appealing to
you. If your Mac has a long, strong password, using Touch ID on your
phone could certainly be faster.
MacID’s iPhone app costs $3.99 on the App Store, and the required Mac app is available for free.
Chromebook and Android Phone
Chromebooks deserve an honorable mention here because Google has
integrated a way to unlock your Chromebook with an Android phone. This
feature is named Smart Lock, and it requires an Android phone with Android 5.0 or newer.
If you have a modern enough Android phone, you can quickly set up
Smart Lock and pair your Chromebook with your phone without any
third-party software. This feature doesn’t yet support Android Wear
watches for some reason — you need an Android phone.
Windows PC and Android Phone
Similarly polished options for Windows just aren’t available.
Previously, the most popular option was BTProximity, which used the
proximity of a Bluetooth-enabled device (such as your smartphone) to
automatically unlock your Windows PC. We can’t find any comparably polished solutions to replace it at the moment.
You can still rig up something to do this yourself with various tools on Android. This solution requires EventGhost on your Windows PC to do the unlocking work, AutoRemote for communicating from your phone to your Windows PC, and Tasker for automatically sending a signal to EventGhost via AutoRemote when certain conditions are met.
The Unlock PC from Android discussion over at StackExchange has some detailed information on setting this up.
Mac and Android Phone (or Any Other Bluetooth Device)
If you have a Mac and an Android phone (or any other Bluetooth-enabled device), you could use the free Proximity tool for Bluetooth proximity detection and set up AppleScripts
that unlock and lock your Mac depending on the proximity of the device
to your Mac. This requires some manual setup, but it should work
similarly to Tether when you’re done.
Lifehacker provides AppleScript code that will do this in this post.
Linux and Any Bluetooth Device
On Linux, try the BlueProximity application for locking and unlocking
your PC in response to the proximity of a Bluetooth device. It should
be available in your Linux distribution’s software repositories, but may
require some configuration before it automatically locks and unlocks
the PC correctly.
If you’re sick of unlocking your phone constantly, Android 5.0 provides other “smart unlock” features. These can automatically keep your phone unlocked when you’re connected to your home Wi-Fi network, for example.