Nuki Smart Lock (Deadbolt)

Keep the outside of the door familiar

Nuki's US Smart Lock replaces the interior thumb turn of a compatible single-cylinder deadbolt. The exterior keyhole and physical keys stay in use. That is appealing when the existing lock is sound or changing its exterior would be unnecessary work.

The motor is a compact stainless-steel cylinder, roughly 2.2 inches across, with a black base ring. It avoids the large interior battery box found on many retrofit locks. An indoor manual turn remains available, while the motor adds app-controlled entry and shared access.

This is the US deadbolt product, not the Euro-profile Ultra with a different label. Its mounting plate and adapters connect to the existing deadbolt tailpiece.

The $289 set makes more sense for many households

On September 10, 2026, Nuki listed the lock alone at $199 and the Home Set NFC, including Keypad 2 NFC, at $289. Buying the $179 keypad separately with the lock would total $378. The bundle saves $89 and adds a practical way in without the app.

Fingerprints and PINs can suit children, visitors or someone stepping outside without a phone. Supported wallet entry adds a phone or watch tap. It is not automatically available to every NFC phone: Apple and Samsung wallet modes have specific device and ecosystem-hub requirements.

The bare motor provides none of those exterior readers. Its Auto Unlock feature instead uses phone location and Bluetooth, rearming after you leave and return to the home geofence. A short trip into the yard may not trigger a new automatic unlock. Price the keypad in from the start if deliberate, phone-free entry is what you want.

We have not tested biometric accuracy, motor noise or unlock speed. Nuki's fast-motor claims should not be mistaken for our measurements.

The old Premium fee is no longer the everyday cost

Older Nuki pages advertised a US Premium subscription and an activation promotion ending in December 2025. Nuki's current US policy now includes Wi-Fi remote access, up to 200 access permissions, activity logs and notifications with the device, without that subscription or an activation code.

That improves the ownership case: ordinary remote control is not another monthly bill. Built-in Wi-Fi can provide remote Nuki operation without buying a bridge or Thread hub. Matter control is a separate route requiring a suitable controller and Thread border router.

Automated rental-property management is a different purchase. Nuki's Smart Hosting service can carry its own subscription; the included household features should not be read as free property-management integration.

A retrofit still has physical limits

The lock fits supported single-cylinder deadbolts, not every door with an interior turn. Nuki supplies three tailpiece adapters and an extension plate, but the tailpiece shape and protrusion still need to fit the mounting system.

Its current guide calls for more than 1.38 inches between the deadbolt centre and both the handle and frame on inward-opening doors. Outward-opening doors need more than 1.58 inches at the frame. A close handle, narrow frame or incompatible tailpiece can defeat an otherwise attractive retrofit.

The motor also relies on the existing bolt moving freely. A door that needs pushing or pulling into alignment should be corrected before expecting reliable remote locking.

Lock status is not the same as knowing the door is closed. Nuki's separate $59 Door Sensor adds open/closed sensing. Include that accessory if checking whether someone left the door ajar is part of the intended use.

Compactness trades battery swaps for charging

The built-in lithium-polymer battery charges through a magnetic connector, on the door or with the motor removed. Nuki quotes roughly two hours for a full charge. Keep the matching cable available; an ordinary USB-C lead alone does not attach to the lock.

This is not a replaceable-AA design. That helps keep the motor small, but a built-in battery problem needs Nuki support rather than a quick set of fresh cells. Battery endurance depends on use, door resistance and the connection method; we have not measured it.

Compare the complete retrofit, not just the motor

Aqara U200 was $169.99 with its fingerprint keypad and Apple home key included. Its larger indoor unit and separate keypad battery are tradeoffs, but it is a substantially cheaper complete entry package.

Aqara U400 was $269.99 and adds supported UWB hands-free entry while replacing the deadbolt. Choose it when a full replacement suits the door and that entry method matters. Nuki's stronger case is preserving the existing outside hardware with a smaller interior motor and optional supported Apple or Samsung wallet access.

Allow for delivery, checkout taxes and any needed hub when comparing the totals. Keep a working smart lock if it already makes entry easy; Nuki is worth the change when its size or access options solve an everyday problem.