Product name
Nuki 4.0 Pro
Summary
The magnet door sensor for Nuki 2.0 was a simple, stylish, and minimal solution that worked well for many built in features, such as Lock n Go. The Nuki 3.0 uses either time based locking or requires an additional (very bulky) sensor combo. Bring back this elegant solution for the next iteration for Nuki Smart Lock (together with NFC and Apple Home Key)?
Features
Built in hardware and small, minimalist magnet to help with door sensing.
Reason
Current Nuki 3.0 solution is not elegant (and with significant additional costs!) - not suitable for modern apartments that doesn’t want to look like a home secured with 1990s technology - I remember seeing doors and windows with these type of bulky 2-part sensors. 
I would prefer this being offered as a Pro version additional hardware feature.