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Danalock is a smart door lock from Danish company Poly-Control.
Like August, Danalock retro-fits to existing deadbolts.
Poly-Control makes a Bluetooth-only lock, a Z-Wave-only lock and one with Bluetooth and Z-Wave capabilities.
The Danalock Android and iOS app lets you access your lock on-the-go.
Its auto-unlock feature relies on Bluetooth to unlock your door hands-free.
You can also extend access to friends and family members.