Main trade-off
Aqara Smart Lock U400, Black
Replacing the deadbolt changes the exterior hardware and key plan.
Head-to-head
Aqara Smart Lock U400 vs Aqara Smart Lock U200: U400 adds supported approach unlocking, U200 keeps your exterior keys
The short answer
Choose U400 when you can replace the deadbolt and want UWB approach unlocking with supported Apple hardware. Choose U200 when keeping the existing exterior cylinder and keys matters more. Both offer home-key taps and fingerprint entry, but U200's retrofit layout and separate keypad create a different installation from U400's replacement lock.
Before you choose
The reasoning and the trade-offs
Keeping a key is different from keeping your current key
Both have mechanical recovery paths, but U200 retains the compatible cylinder already fitted to your door. U400 supplies a replacement lock, so preserving an existing keyed system requires a separate rekeying decision.
What this is based on
Aqara describes U200 as a retrofit that retains the original key. U400 is a replacement deadbolt with supplied keys and a rekeyable design.
Main trade-off
Aqara Smart Lock U200, Silver
No documented UWB approach-unlock feature.
Aqara Smart Lock U400, Black
- Choose it for
- Use UWB approach unlocking with compatible Apple devices and a Thread-enabled Apple home hub
- Replace the deadbolt with one integrated exterior keypad and fingerprint unit
- Main trade-off
- Replacing the deadbolt changes the exterior hardware and key plan.
Aqara Smart Lock U200, Silver
- Choose it for
- Keep the compatible existing exterior cylinder and keys
- Place the included separate keypad where it is easier to reach
- Main trade-off
- No documented UWB approach-unlock feature.
About this comparison
Compare Aqara U400 and U200 for hands-free Apple entry, retaining existing keys, keypad placement and the Thread hardware each installation needs.
Choose U400 when you can replace the deadbolt and want UWB approach unlocking with supported Apple hardware. Choose U200 when keeping the existing exterior cylinder and keys matters more. Both offer home-key taps and fingerprint entry, but U200's retrofit layout and separate keypad create a different installation from U400's replacement lock.
Winner by situation
Start with what you need it to do
I must retain the existing outside cylinder and keys
U200 retrofits a compatible lock. U400 replaces the deadbolt.
- Aqara Smart Lock U400, Black
- Not suitable
- Aqara Smart Lock U200, Silver
- Better fit
I want supported Apple UWB approach unlocking
U400 documents this capability with compatible devices and an Apple Thread home hub.
- Aqara Smart Lock U400, Black
- Better fit
- Aqara Smart Lock U200, Silver
- Not suitable
I only need a home-key tap or fingerprint
Both supply those entry methods, so installation fit can decide.
- Aqara Smart Lock U400, Black
- Good
- Aqara Smart Lock U200, Silver
- Good
I want a separately positioned keypad
U200 includes a separate keypad that needs its own suitable mounting and power plan.
- Aqara Smart Lock U400, Black
- Not suitable
- Aqara Smart Lock U200, Silver
- Better fit
I want Matter remote control with no controller or Thread network
Both need suitable Matter and Thread infrastructure for that integration.
- Aqara Smart Lock U400, Black
- Not suitable
- Aqara Smart Lock U200, Silver
- Not suitable
What matters in practice
The differences that matter
Keeping a key is different from keeping your current key
Both have mechanical recovery paths, but U200 retains the compatible cylinder already fitted to your door. U400 supplies a replacement lock, so preserving an existing keyed system requires a separate rekeying decision.
How we reached this conclusion
Aqara describes U200 as a retrofit that retains the original key. U400 is a replacement deadbolt with supplied keys and a rekeyable design.
A UWB-capable phone is only part of U400's setup
The approach-unlock plan also needs Aqara's supported Apple device combination and a Thread-enabled Apple home hub. Owning an iPhone alone does not prove that this hands-free feature will work.
How we reached this conclusion
The U400 page explicitly conditions UWB unlocking on select iPhone or Apple Watch models and a Thread-enabled Apple home hub.
U200 creates two power-maintenance points
Its interior motor and separate keypad are independently powered. Recharging the lock does not replace the keypad batteries, unless you install the documented wired keypad supply.
How we reached this conclusion
U200 specifies a rechargeable lock battery and four AAA keypad batteries or 12 to 24 V AC/DC keypad input. U400 uses a rechargeable integrated lock battery.
Choice A
Aqara, DL-D06E
Smart Lock U400, Black
A Matter-over-Thread deadbolt with fingerprint access, Apple home key and supported-device UWB approach unlocking.
- Best matched use
- Use UWB approach unlocking with compatible Apple devices and a Thread-enabled Apple home hub
Checked facts
- Installation: Full deadbolt replacement
- Hands-free approach entry: UWB with supported Apple hardware
- Apple home key and fingerprints: Both supported
- Exterior keypad layout: Integrated with replacement exterior panel
Choice B
Aqara, EL-D02E
Smart Lock U200, Silver
Entry options include fingerprint, home-key, keypad, phone. The documented platform list includes apple, google, alexa, matter.
- Best matched use
- Keep the compatible existing exterior cylinder and keys
Checked facts
- Installation: Interior retrofit with separate keypad
- Hands-free approach entry: No UWB approach entry documented
- Apple home key and fingerprints: Both supported
- Exterior keypad layout: Separate included keypad
Meaningful differences
What changes the fit
| What changes | Aqara Smart Lock U400, Black | Aqara Smart Lock U200, Silver | Why it matters |
|---|---|---|---|
| Installation | Full deadbolt replacement | Interior retrofit with separate keypad | U200 keeps compatible outside hardware, while U400 replaces it. |
| Hands-free approach entry | UWB with supported Apple hardware | No UWB approach entry documented | A home-key tap and hands-free approach unlock are separate capabilities. |
| Apple home key and fingerprints | Both supported | Both supported | Basic tap and fingerprint access do not require choosing U400. |
| Exterior keypad layout | Integrated with replacement exterior panel | Separate included keypad | U200 introduces a second mounting position and a separate power supply. |
| Power | Rechargeable lock battery | Rechargeable lock battery plus AAA or wired keypad power | U200's keypad power has to be planned independently from the motor unit. |
| Matter connection | Matter over Thread | Matter over Thread | Both require suitable controller and Thread infrastructure for their ecosystem integration. |
What you give up
Every choice has a cost
If you choose Aqara Smart Lock U400, Black
- UWB entry depends on specific Apple devices and home-hub support.
If you choose Aqara Smart Lock U200, Silver
- The separate keypad needs mounting and its own battery or wired power.
Recommendation switch
The decision flips if...
The exterior lock and keys must stay unchanged
Choose Aqara Smart Lock U200, Silver. U200 is the compatible-lock retrofit option.
Supported Apple UWB approach unlock is the reason for buying
Choose Aqara Smart Lock U400, Black. U400 documents that hands-free entry feature.
I need Matter remote control without any Thread border router
Choose neither. Neither is ready for the requested Matter remote-control plan without it.
What matters in practice
How to make the call
Start with the hardware you are allowed to change
U200 is the relevant option when the outside of the door or the existing key system must remain in place. That does not guarantee every deadbolt will fit. Check the tailpiece and cylinder compatibility, interior space and landlord permission. U400 suits a full replacement with the specified strike hardware.
Distinguish approach unlock from a phone tap
Both models support tapping compatible Apple hardware and using fingerprints. U400's extra promise is UWB approach unlocking, which depends on a supported Apple setup. Confirm your exact phone, watch and home hub against Aqara's current compatibility guidance before paying for that particular convenience.
Plan the separate keypad deliberately
U200 gives you freedom to position its keypad away from the lock body. That can improve reach, but it also adds a mounting task and another battery supply unless you wire it correctly. U400 keeps the exterior controls together. Choose the arrangement that fits the door and the people using it.
What this comparison cannot tell you
- We have not tested approach detection, fingerprint accuracy or installation on your door. A Matter badge alone does not establish every ecosystem feature or hub combination.
What the facts say
What the comparison shows
Useful conclusions from the current smart locks comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Aqara Smart Lock U400, Black |
|
| |
| Aqara Smart Lock U200, Silver |
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Aqara Smart Lock U400, Black
Use UWB approach unlocking with compatible Apple devices and a Thread-enabled Apple home hub
See price & reviews on AmazonAqara Smart Lock U200, Silver
Keep the compatible existing exterior cylinder and keys
See price & reviews on AmazonLinks open in a new tab.