Nuki Smart Lock Pro (4th Gen) review
Nuki Smart Lock Pro (4th Generation)
By Tom Calder
The manufacturer has replaced this model with a newer version, so we no longer recommend buying it new — remaining listings are old stock or secondhand. For current alternatives we do recommend, see our Smart locks guide.
Key specs
The maker's figures.
- Type
- Clamp-on — existing euro-cylinder stays in place
- Access methods
- App, integrated WiFi, Matter, optional keypad
- Battery life
- Rechargeable Power Pack, ~6 months claimed
- Insurance
- Clamp-on — existing BS3621 lock underneath stays functional
The more insurance-friendly of the two Nuki locks we compare: it clamps onto the existing thumbturn rather than replacing the cylinder, so a BS3621-rated lock underneath stays exactly as it was. Built-in WiFi and Matter support mean no separate bridge is needed, and it costs meaningfully less than the Ultra.
- Best for
- Households who want to keep their existing BS3621-rated cylinder in place while adding WiFi-connected smart access with Matter support.
- Skip it if
- Your existing cylinder isn't a standard euro-profile thumbturn
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Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Clamps onto the existing thumbturn without replacing the cylinder, so any current BS3621-rated lock stays functional underneath
- Built-in WiFi and Matter (over Thread) support without a separate bridge
- Costs meaningfully less than the Ultra
Worth knowing
- The previously sold '4th generation'-labelled listing is discontinued; current stock is the same physical design sold simply as 'Nuki Smart Lock Pro (Euro Profile)', so double-check you're buying the current listing
- Nuki itself makes no BS3621 or insurance-approval claim for the unit
- Full PIN/fingerprint entry needs the separately sold Keypad 2
ⓘ As an Amazon Associate, PreparedBritain earns from qualifying purchases. We may earn a commission when you buy, or a fee when you request a quote, through our links. When two products are close, commission can decide which one we pick. A clearly better product always wins. Amazon prices come from Amazon's own product data and show the date and time they were retrieved. Prices at other retailers are checked by us, less often. Prices and stock can change at any time, so always check the retailer's price before you buy.
Who shouldn't buy this
Skip this if your existing cylinder isn't a standard euro-profile thumbturn; check compatibility against Nuki's own documentation before buying.
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Homeowners who want to add app and PIN access to an existing UK cylinder lock without swapping out their current deadlock.
Best for Households wanting to replace their entire door handle with a keyless smart handle rather than just adding an actuator.
as of 4 Nov 2026, 19:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for Adding app and keypad entry to an existing door lock without changing the cylinder, at Nuki's lowest price.
as of 4 Nov 2026, 19:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Free alerts for your home
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