Nuki adds tap to unlock capability to its retrofit lock via a new keypad. | Image: Nuki This week, my top pick for a retrofit smart lock launched the first Aliro-compatible keypad. The Nuki Keypad 2 NFC ($179) brings tap-to-unlock via Apple's Home Key and Samsung's Digital Home Key to the Nuki smart lock, allowing you to tap your phone or smartwatch to unlock your door, just like you tap to pay. Aliro is a new smart lock standard supported by all major platforms and handset manufacturers. It is designed to allow any smart lock to be securely unlocked by any smartphone, regardless of manufacturer, without requiring proprietary apps. An open standard, Aliro stores a digital key in your phone's wallet that you can tap to a com … Read the full story at The Verge.