Alternative products to Knock 2.0

Knock 2.0

Unlock your Mac quickly and securely. Now with Apple Watch.

8 alternative and related products to Knock 2.0

DroidID

Unlock your Mac using your Android's fingerprint sensor

DroidID is an app for Android that lets you unlock your Mac with a fingerprint sensor.

Android Authority
Update: It looks like the developer already pushed out a new update. You can now dismiss the persistent notification, and there are a few other fixes.
8 Alternatives to DroidID

Unlox

Unlock your Mac with your fingerprint, wrist or face 🔒

Unlock your Mac with just your fingerprint, wrist and now your face – without even unlocking your iOS device. Formerly called MacID, Unlox is better than ever.

Unlox
Edit 2] Apple have now approved the upgrade bundle. You can find it on the iOS App Store (the bundle will be unavailable until Unlox is full price on the App Store). It looks like Apple are charging the difference between when you originally paid for MacID and the price it would be now.
11 Alternatives to Unlox
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