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Door Locks · Head to head

Aqara Smart Lock U200 vs Nuki Smart Lock Ultra

Full Smart Door Locks comparison in 2026

Updated October 2026
Data from Amazon and official Aqara and Nuki sites.
2026 verdict
For a household that wants a fingerprint reader, keypad codes and Apple Home Key on the lock itself, the Aqara Smart Lock U200 is the better smart lock of this pair.
It builds in fingerprint, passcode (one-time, periodic and anti-peep codes), NFC and Home Key entry, and adds an IPX5 weather rating, where the Nuki Smart Lock Ultra opens by app, Bluetooth or key and sells its keypad and fingerprint reader as accessories. The Nuki replies with a two-year warranty against one, stronger owner reviews and Wi-Fi and Bluetooth radios alongside Thread, so it does not lean on a Thread border router for every connection. Both speak Matter, work with Apple Home, Google Home, Alexa, SmartThings and Home Assistant, keep the physical key and relock when the door closes. Choose the Aqara Smart Lock U200 for a US-style deadbolt and every way in built in, and the Nuki Smart Lock Ultra for a European cylinder door and a lock its owners call fast and refined.
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FeatureAqara Smart Lock U200Nuki Smart Lock UltraWinner
Price$169.99€349.00Aqara Smart Lock U200
Rating2.64.5Nuki Smart Lock Ultra
Warranty1 year2 yearsNuki Smart Lock Ultra
Weather ResistanceIPX5NOAqara Smart Lock U200
ConnectivityBluetooth, Thread Protocol2.4 GHz WiFi, Bluetooth, Thread ProtocolNuki Smart Lock Ultra
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical KeyRemote, Bluetooth, Passcode, Fingerprint, Physical KeyAqara Smart Lock U200
One-Time PasswordYESKeypad requiredAqara Smart Lock U200
Periodic PasswordYESKeypad requiredAqara Smart Lock U200
Anti-peep PasswordYESNOAqara Smart Lock U200
Battery Life6 months6 monthsTie
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterTie
Emergency FingerprintNONOTie

What the differences mean

Ways to get in

The Aqara Smart Lock U200 reads fingerprints, takes keypad codes, taps with NFC and supports Apple Home Key with no extra hardware. On the Nuki Smart Lock Ultra, codes need the Nuki Keypad and fingerprints the Keypad 2, and there is no NFC or Home Key, so the everyday way in is the phone or the key.

The door it fits

Owners fit the Aqara Smart Lock U200 over a standard US-style deadbolt, keeping the outside key. The Nuki Smart Lock Ultra is a retrofit for European-style cylinder doors, so the door you have decides much of this comparison before any feature does.

How it connects

The Nuki Smart Lock Ultra carries 2.4 GHz Wi-Fi and Bluetooth as well as Thread. The Aqara Smart Lock U200 joins the smart home over Thread and needs a Thread border router for it, so a home without a Thread hub should count on adding one.

Weather rating

The Aqara Smart Lock U200 is rated IPX5 against splashing water, while the Nuki Smart Lock Ultra has no weather rating. That matters for an exposed exterior door more than for an apartment door in a hallway.

Power and backup

Both run on a built-in rechargeable battery rated for about 6 months. The Aqara Smart Lock U200 adds AAA batteries and a USB port as backup power, while the Nuki Smart Lock Ultra lists no backup battery, so a flat Nuki means the physical key.

Which one to buy if

Winner
  • + Price: $169.99
  • + Weather Resistance: IPX5
  • + Lock/Unlock System: Remote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical Key
  • - Rating: 2.6 vs 4.5
  • - Warranty: 1 year vs 2 years

What owners say

Owners of both locks describe a retrofit that goes on without replacing the door hardware, and both groups like how cleanly each joins Apple Home. From there the stories split. Aqara Smart Lock U200 owners single out Apple Home Key with an Apple Watch and a quick fingerprint reader, but their complaints are heavier: calibration that fails until the mounting is just right, a clunky app with no printed instructions, a Thread hub needed before remote control works, and several units grinding or failing after roughly a year. Nuki Smart Lock Ultra owners, many of them coming from older Nukis, talk about a faster, more premium lock, a guided install of about an hour and remote access that worked out of the box. Their complaints are mostly about the price, plus a fiddly cylinder length setting and one too-short screw.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Aqara Smart Lock U200
  • Nuki Smart Lock Ultra

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Frequently Asked Questions

Which is better overall: Aqara Smart Lock U200 or Nuki Smart Lock Ultra?

The Aqara Smart Lock U200 wins on features: fingerprint, keypad codes, NFC and Apple Home Key are built in, and it is rated IPX5. The Nuki Smart Lock Ultra is the better reviewed lock, with a two-year warranty and Wi-Fi alongside Thread, but it needs accessories for codes and fingerprints.

Nuki vs Aqara U200: what is the biggest difference?

Where the entry methods live. The Aqara Smart Lock U200 has a fingerprint reader, keypad, NFC and Home Key on the lock, while the Nuki Smart Lock Ultra opens by app, Bluetooth or key and adds codes and fingerprints only through the separate Nuki Keypad and Keypad 2. Door type matters too: the Aqara goes on US-style deadbolts, the Nuki on European cylinders.

Do the Aqara Smart Lock U200 and the Nuki Smart Lock Ultra work with Apple Home and Matter?

Yes. Both are Matter locks over Thread and work with Apple Home, Google Home, Alexa, SmartThings and Home Assistant. Only the Aqara Smart Lock U200 also supports Apple Home Key, and the Nuki Smart Lock Ultra is the one with built-in Wi-Fi as well.

How long does the battery last on the Aqara Smart Lock U200 and the Nuki Smart Lock Ultra?

Both are rated for about 6 months on their built-in rechargeable battery. The Aqara Smart Lock U200 can also run on AAA batteries or USB power as a backup, which the Nuki Smart Lock Ultra does not list.

Who should buy the Aqara Smart Lock U200?

Apple Home households with a US-style deadbolt who want fingerprint, keypad, NFC and Home Key entry in one lock, and who already run a Thread border router or are willing to add one.

Is the Nuki Smart Lock Ultra a good Aqara U200 alternative?

For a European cylinder door, yes. The Nuki Smart Lock Ultra is the better reviewed of the two, adds Wi-Fi and a two-year warranty, and owners describe it as fast and premium. It suits buyers who open with their phone or auto-unlock and do not mind adding the keypad later.

Full comparison table

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