Door Locks · Head to head

Aqara Smart Lock U400 vs Philips 4200 Series Smart Deadbolt with Door Lever

Full Smart Door Locks comparison in 2026

Updated June 2026
Data from Amazon and official Aqara and Philips sites.
2026 verdict
Aqara Smart Lock U400 has the better all-around case than Philips 4200 Series Smart Deadbolt with Door Lever in 2026, starting with connectivity, integrations, and Lock/Unlock system. What pushes it ahead is connectivity, integrations, and Lock/Unlock system, and its broader overall balance keeps the advantage from looking narrow. Philips 4200 Series Smart Deadbolt with Door Lever remains a niche alternative if price and rating matter more than the rest of the comparison. That is why the final call still favors Aqara Smart Lock U400.
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FeatureAqara Smart Lock U400Philips 4200 Series Smart Deadbolt with Door LeverWinner
Price$269.99$109.98Philips 4200 Series Smart Deadbolt with Door Lever
Rating4.04.4Philips 4200 Series Smart Deadbolt with Door Lever
ConnectivityBluetooth, Thread Protocol, Other2.4 GHz WiFi, BluetoothAqara Smart Lock U400
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Home AssistantAqara Smart Lock U400
Lock/Unlock SystemRemote, Bluetooth, Passcode, Fingerprint, NFC Tag, Apple Home Key, Physical KeyRemote, Bluetooth, Passcode, Fingerprint, Physical KeyAqara Smart Lock U400
Weather ResistanceIP65YESTie
Battery Life6 months6 monthsTie
One-Time PasswordYESYESTie
Periodic PasswordYESYESTie
Anti-peep PasswordYESYESTie
Emergency FingerprintNONOTie
DoorbellNONOTie

Frequently Asked Questions

Which is better overall: Aqara Smart Lock U400 or Philips 4200 Series Smart Deadbolt with Door Lever?

Aqara Smart Lock U400 has the stronger overall profile in this comparison, especially for connectivity, integrations, and Lock/Unlock system.

What is the biggest difference between Aqara Smart Lock U400 and Philips 4200 Series Smart Deadbolt with Door Lever?

Price is one of the clearest differences: Aqara Smart Lock U400 lists $269.99, while Philips 4200 Series Smart Deadbolt with Door Lever lists $109.98.

Which one looks better on price?

Aqara Smart Lock U400 is listed at $269.99, while Philips 4200 Series Smart Deadbolt with Door Lever is listed at $109.98. Philips 4200 Series Smart Deadbolt with Door Lever (better spec).

Who should buy Aqara Smart Lock U400?

Choose Aqara Smart Lock U400 if your priority is connectivity and integrations and that matters more than price.

Who should buy Philips 4200 Series Smart Deadbolt with Door Lever?

Choose Philips 4200 Series Smart Deadbolt with Door Lever if your priority is price and rating and that matters more than connectivity.

Full comparison table

Compare all 39 Door Locks side by side

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  • 39 Door Locks
  • 55 specs compared
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