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| Feature | Aqara Smart Lock U200 | Nuki Smart Lock Ultra | Winner |
|---|---|---|---|
| Price | $169.99 | €349.00 | Aqara Smart Lock U200 |
| Rating | 2.6 | 4.5 | Nuki Smart Lock Ultra |
| Warranty | 1 year | 2 years | Nuki Smart Lock Ultra |
| Weather Resistance | IPX5 | NO | Aqara Smart Lock U200 |
| Connectivity | Bluetooth, Thread Protocol | 2.4 GHz WiFi, Bluetooth, Thread Protocol | Nuki Smart Lock Ultra |
| Lock/Unlock System | Remote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical Key | Remote, Bluetooth, Passcode, Fingerprint, Physical Key | Aqara Smart Lock U200 |
| One-Time Password | YES | Keypad required | Aqara Smart Lock U200 |
| Periodic Password | YES | Keypad required | Aqara Smart Lock U200 |
| Anti-peep Password | YES | NO | Aqara Smart Lock U200 |
| Battery Life | 6 months | 6 months | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| Emergency Fingerprint | NO | NO | Tie |
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
- you want fingerprint and Apple Home Key without buying accessories
The Aqara Smart Lock U200 has both on the lock, plus keypad codes and NFC.
- your front door has a European-style cylinder
The Nuki Smart Lock Ultra is built as a retrofit for exactly that kind of door.
- you have no Thread border router at home
The Nuki Smart Lock Ultra also has Wi-Fi and Bluetooth, while the U200 relies on Thread for its smart home link.
- the door is exposed to rain
Only the Aqara Smart Lock U200 carries a weather rating, IPX5.
- a longer warranty is part of the decision
The Nuki Smart Lock Ultra comes with two years of warranty against one for the Aqara.
- + 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
- + Rating: 4.5
- + Warranty: 2 years
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Thread Protocol
- - Price: €349.00 vs $169.99
- - Weather Resistance: NO vs IPX5
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.
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