Aqara Smart Lock U100 Review
Fingerprint, Apple Home Key, and keypad entry on one deadbolt that fits most US doors in minutes.
Walk up, tap your iPhone or Apple Watch, and the deadbolt clicks open. The Aqara U100 is one of the few smart locks that makes Apple Home Key feel less like a gimmick and more like the way you'll always unlock your door.
What the Aqara U100 actually is
This is a retrofit deadbolt that replaces the interior side of your existing lock while keeping the outside hardware compatible with most standard US doors. The pitch is three ways in on one device: a fingerprint reader, Apple Home Key (tap-to-unlock with iPhone or Apple Watch), and a backlit PIN keypad. There's also a physical key as backup and Bluetooth control through the Aqara app.
The headline feature is Apple Home Key, and the U100 is genuinely good at it. You add a digital key to your Apple Wallet, hold your phone near the lock, and it opens. No app to open, no waking the screen. For an iPhone household this is the single best reason to pick this lock over a Schlage Encode or a Wyze Lock.
How it performs day to day
Installation is the part people worry about and it shouldn't be. Most owners report the swap takes around 20 minutes with a screwdriver, assuming you have a standard deadbolt. The U100 ships with adapters and a tailpiece kit to handle different door thicknesses, which covers the vast majority of American doors.
Fingerprint reads are fast and the keypad is responsive, with the kind of reliability you want from a lock you trust your kids to use. Battery life is a real strength. The four AA cells inside typically last several months to most of a year depending on traffic, and the lock nags you well before they die. There's also a USB-C port near the keypad so you can jolt it back to life if you ever get locked out by dead batteries.
The catch is the smarts. Out of the box the U100 talks Bluetooth and Apple HomeKit. To get remote control, alerts, and Alexa or Google Assistant, you need an Aqara hub like the M2 or M3. The hub-free version supports Matter over Thread if you go that route, but plenty of buyers get confused about which model does what. Read the listing carefully before you click buy.
The good and the annoying
Pros: Apple Home Key that just works, three solid entry methods, easy install, strong battery life, and a price that usually lands well under what a comparable Schlage or Yale Apple Home Key lock costs. The build feels more substantial than the budget-bin smart locks.
Cons: Android users miss out on the marquee Home Key feature entirely, so the value proposition shrinks a lot if nobody in the house carries an iPhone. The Aqara app is functional but not the most polished, and the ecosystem split between hub-based and Matter versions is needlessly confusing. The exterior keypad is plastic and won't fool anyone into thinking it's premium hardware.
Who should buy it, who should skip it
Buy the U100 if you live in an iPhone household and want Home Key without paying Yale or Schlage prices. It's also a smart pick for families who want fingerprint entry for kids and a keypad for the dog walker. For a renter-friendly upgrade that doesn't change the exterior look of your door, it's one of the easiest recommendations in the category.
Skip it if your home runs on Android phones, since you'll lose the best feature and a cheaper keypad lock would serve you just as well. Skip it too if you refuse to add a hub and don't want to deal with Matter setup, because the no-hub experience is more limited than the marketing suggests.
The verdict
For iPhone owners, the Aqara Smart Lock U100 is the best-value Apple Home Key deadbolt you can buy right now. It nails the core experience, installs fast, and the battery situation is sensible. Just go in knowing the Android limitation and the hub question, and you'll be happy with it.
Frequently asked questions
- Does the Aqara U100 work without a hub?
- Yes, for local features. Fingerprint, keypad, the physical key, and Apple Home Key all work over Bluetooth and HomeKit without a hub. For remote access, notifications, and Alexa or Google Assistant control, you need an Aqara hub or the Matter version on a Thread network.
- Does the Aqara U100 work with Android phones?
- Partially. Android users can use the fingerprint reader, keypad, physical key, and the Aqara app, but Apple Home Key tap-to-unlock is iPhone and Apple Watch only. If nobody in your home uses an iPhone, you lose the lock's standout feature.
- How long does the Aqara U100 battery last?
- Owners typically get several months to nearly a year on the four AA batteries, depending on how often the lock is used. It warns you in advance, and there's a USB-C port for an emergency power boost if the batteries die while you're locked out.
Daniel covers home, kitchen, and everyday-carry gear. He's a stickler for durability and value, and has no patience for overpriced hype.
