The catch
Aqara Smart Lock U400, Black
A visible keypad panel results from its integrated electronics.
Side by side
Aqara Smart Lock U400 vs Level Lock Pro: Level’s guest codes need an optional keypad, while U400 includes one
Quick verdict
For an integrated keypad, a fingerprint reader and supported Apple UWB approach unlocking, pick U400. For concealed smart hardware and a replaceable CR2 battery, pick Level Lock Pro. Both replace the deadbolt and support Apple home key, but code entry on Level needs an optional keypad. Check the door and home-hub requirements first.
Before you buy
Why, and what it costs you
Code entry on a Level setup brings in another device
With the optional keypad you get a second powered component to mount and maintain. U400 keeps code entry in the exterior panel of the lock itself.
Where this comes from
The keypad is sold separately and AA-powered, per Level. The Level lock itself runs on one CR2 battery. U400 documents an integrated keypad and a rechargeable lock battery.
The catch
Level Lock Pro, Matte Black
A separate powered keypad is required for code entry.
Aqara Smart Lock U400, Black
- Why pick it
- Get fingerprints and codes with no separate keypad to buy
- Unlock on approach with UWB, using the required Apple devices and home hub
- The catch
- A visible keypad panel results from its integrated electronics.
Level Lock Pro, Matte Black
- Why pick it
- Have the smart hardware inside the door so the exterior looks conventional
- Swap in a CR2 cell instead of recharging a built-in lock battery
- The catch
- A separate powered keypad is required for code entry.
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What this page compares
Integrated fingerprint and code entry, Apple UWB requirements, a discreet exterior and battery maintenance are where Aqara U400 and Level Lock Pro are set side by side.
For an integrated keypad, a fingerprint reader and supported Apple UWB approach unlocking, pick U400. For concealed smart hardware and a replaceable CR2 battery, pick Level Lock Pro. Both replace the deadbolt and support Apple home key, but code entry on Level needs an optional keypad. Check the door and home-hub requirements first.
Which one fits
Pick the situations that sound like you
The lock package has to include guest code entry
The keypad comes with U400. The Level lock-only offer that was reviewed requires a separate Level Keypad.
- Aqara Smart Lock U400, Black
- Better fit
- Level Lock Pro, Matte Black
- Not suitable
Identification by fingerprint is required
A fingerprint reader is documented for U400 alone.
- Aqara Smart Lock U400, Black
- Better fit
- Level Lock Pro, Matte Black
- Not suitable
A conventional deadbolt look is wanted on the outside
Inside the door is where Level conceals its electronics. U400 has a keypad panel you can see.
- Aqara Smart Lock U400, Black
- Caution
- Level Lock Pro, Matte Black
- Better fit
I’d rather swap a disposable battery than charge the lock
One CR2 lithium cell powers Level. U400 runs on a rechargeable lock battery.
- Aqara Smart Lock U400, Black
- Not suitable
- Level Lock Pro, Matte Black
- Better fit
My existing exterior cylinder has to stay
Each replaces the deadbolt. Level Lock Pro is a different product from the Level Bolt retrofit.
- Aqara Smart Lock U400, Black
- Not suitable
- Level Lock Pro, Matte Black
- Not suitable
In practice
Differences you will notice
Code entry on a Level setup brings in another device
With the optional keypad you get a second powered component to mount and maintain. U400 keeps code entry in the exterior panel of the lock itself.
How we worked this out
The keypad is sold separately and AA-powered, per Level. The Level lock itself runs on one CR2 battery. U400 documents an integrated keypad and a rechargeable lock battery.
Touch access is not the same as biometric identification
If the lock must identify the user’s fingerprint, that points toward U400. Level’s touch feature can’t be counted as a fingerprint reader just because a hand touches the lock.
How we worked this out
Fingerprint storage and recognition are specifically documented by Aqara. Level lists touch access and other credentials but no fingerprint recognition hardware.
Sharing a home-key label doesn’t mean UWB compatibility
Tapping with Apple home key works on both. U400’s approach-unlock mode adds device and Thread-enabled Apple home-hub requirements. Check the full combination before you pay for the feature.
How we worked this out
According to Aqara’s UWB footnote, select iPhone or Apple Watch models and a Thread-enabled Apple home hub are required. Level documents home-key tapping and lists auto-unlock separately, without claiming UWB.
Option A
Aqara, DL-D06E
Smart Lock U400, Black
Fingerprint access, Apple home key and UWB approach unlocking on supported devices come together in this Matter-over-Thread deadbolt.
- Best for
- Get fingerprints and codes with no separate keypad to buy
Facts we checked
- Code-entry hardware: Integrated keypad
- Fingerprint entry: Integrated fingerprint reader
- UWB approach unlocking: Documented for supported Apple devices with a Thread-enabled Apple home hub
- Battery maintenance: Rechargeable lock battery
Option B
Level, Level Lock Pro
Lock Pro, Matte Black
Documented for doors 1.75 to 2 inches thick, it lists home-key, phone, touch, key-fob, physical-key among its entry options.
- Best for
- Have the smart hardware inside the door so the exterior looks conventional
Facts we checked
- Code-entry hardware: Compatible Level Keypad sold separately
- Fingerprint entry: Touch access, without fingerprint identification
- UWB approach unlocking: No UWB method documented, app-based auto-unlock is listed
- Battery maintenance: One replaceable CR2 lithium battery
Spec by spec
Where they really differ
| Spec | Aqara Smart Lock U400, Black | Level Lock Pro, Matte Black | In practice |
|---|---|---|---|
| Code-entry hardware | Integrated keypad | Compatible Level Keypad sold separately | A keypad for visitors isn’t part of the Level lock-only offer. |
| Fingerprint entry | Integrated fingerprint reader | Touch access, without fingerprint identification | Entry by touch and entry by fingerprint identification are different methods. |
| UWB approach unlocking | Documented for supported Apple devices with a Thread-enabled Apple home hub | No UWB method documented, app-based auto-unlock is listed | Don’t confuse auto-unlock features generally with Apple’s UWB route. |
| Battery maintenance | Rechargeable lock battery | One replaceable CR2 lithium battery | Different supplies go with the maintenance routine you choose. |
| Exterior appearance | Visible integrated keypad and fingerprint panel | Conventional-looking deadbolt with concealed electronics | Their appearance differs, but each is a replacement lock. |
| Apple home key | Supported | Supported | Choosing U400 isn’t required for a basic home-key tap alone. |
Trade-offs
What each pick costs you
With Aqara Smart Lock U400, Black
- The battery has to be recharged, and UWB needs the specified Apple hardware and home hub.
With Level Lock Pro, Matte Black
- No UWB method is documented, and touch access doesn’t amount to fingerprint identification.
Change of plan
When the answer changes
A requirement for fingerprint identification and an included keypad
Go with Aqara Smart Lock U400, Black. Both come in the integrated exterior panel of U400.
Priorities are a conventional-looking exterior and a replaceable CR2 cell
Go with Level Lock Pro, Matte Black. The requested battery type is what Level uses, and it conceals its smart hardware.
The exterior cylinder in place now has to stay installed
Neither model fits. Each product is a replacement deadbolt.
Decision guide
How to decide
U400 is the pick for an integrated keypad, fingerprint reader and supported Apple UWB approach unlocking. Level Lock Pro is the pick for concealed smart hardware and a replaceable CR2 battery. Both replace the deadbolt and support Apple home key, but the optional keypad is what gives Level code entry. Confirm the door and home-hub requirements first.
Cost the entry methods you need
Someone who prefers home key, a fob or a physical key may be fine with a Level lock-only offer. Visitors who need codes change the shopping list, because the compatible keypad is separate. U400 supplies its keypad and fingerprint reader together. Compare the complete package that the people using the door require.
Separate tapping from approach unlocking
Apple home key is documented for both products, so a preference for tapping cannot decide between them. The UWB approach feature on U400 adds a check of specific Apple hardware and the home hub. Level also lists auto-unlock, but the page reviewed does not describe it as UWB. How the connection works matters more than a shared automatic-unlock label.
Look at what installation and maintenance involve
Level looks discreet, but it is not an interior-only retrofit. It replaces the existing deadbolt and specifies a 1.75 to 2-inch door range, subject to its other fit requirements. U400 replaces the lock as well. Decide between a spare CR2 cell and a charging routine, and check the exact package for any included hub or extra battery.
What this page can’t tell you
- Lock security, approach detection, biometric accuracy and battery runtime have not been tested by us. Support for a smart-home protocol does not guarantee every feature on every phone and hub combination.
By the numbers
What the data shows
What we found across the smart locks we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Aqara Smart Lock U400, Black |
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| Level Lock Pro, Matte Black |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Aqara Smart Lock U400, Black
Get fingerprints and codes with no separate keypad to buy
See price & reviews on AmazonLevel Lock Pro, Matte Black
Have the smart hardware inside the door so the exterior looks conventional
See price & reviews on AmazonEach link opens in a new tab.
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