Nuki Smart Lock Ultra review
Buyers wanting the most integrated Nuki experience (built-in WiFi and Matter) who are happy to replace their cylinder entirely and check BS3621 compliance separately.
By Tom Calder
Technically the most capable Nuki on test, with integrated WiFi, Matter support and a genuinely fast two-hour recharge — but installing it means physically swapping your existing door cylinder for Nuki's own Universal Cylinder, which carries no BS3621 or Sold Secure rating of its own, so it needs a clear-eyed insurance check that the clamp-on Nuki Pro doesn't.
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- Built-in WiFi and Matter support without needing a separate bridge
- Recharges fully in around two hours via the included magnetic cable
- Works with the optional Keypad 2.0 for fingerprint or PIN entry
- Replaces your existing door cylinder rather than clamping onto it, so any BS3621-rated lock you currently have is removed, not left in place
- Nuki makes no BS3621 or Sold Secure claim for the Universal Cylinder that comes with it
- The most expensive lock in this comparison
Who shouldn't buy this
Skip this if you need to keep a BS3621-rated cylinder in place for your insurance; look at the Nuki Smart Lock Pro instead, which clamps onto your existing cylinder without replacing it, or Nuki's separate Ultion-cylinder bundle if you want BS3621 compliance built in.
Key specs
| Type | Replaces existing cylinder with Nuki's Universal Cylinder |
| Access methods | App (BT/WiFi/Matter), auto-unlock, optional keypad |
| Battery life | Rechargeable, ~2hr recharge, months per charge |
| Insurance | Replaces cylinder — no BS3621/Sold Secure claim of its own |
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Alternatives to consider
as of 20 Sep 2026, 12:29 BST · Details
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