Shopping for the best smart locks under $150 gets easier once you decide between a deadbolt-only upgrade and a complete handle set. You also need to match remote access, fingerprint entry, and battery format to the door and household using it.
Pros
- Fingerprint access in under one second
- Built-in Wi-Fi, no bridge required
- Up to eight months with eight AA batteries
- BHMA Grade 3 certification
Cons
- Requires eight AA batteries
- IP53 protection, not fully waterproof
Pros
- Fingerprint handle recognition for keyless entry
- Built-in Wi-Fi with remote app control
- Real-time notifications and event history
- 15-minute installation with no drilling
- Works with left- and right-hand doors
Cons
- Requires eight AA batteries
- IP53 protection limits outdoor exposure
Pros
- Apple Home Key with iPhone and Apple Watch
- Fingerprint reader stores up to 50 prints
- Four AA batteries last up to 8 months
- IP65 zinc-alloy body, emergency USB-C charging
Cons
- Aqara Zigbee hub required for remote passwords
- NFC card sold separately
Pros
- Built-in WiFi, no hub required
- Fingerprint entry in 0.3 seconds
- One-time and recurring PIN codes
- Matching handle set included
Cons
- Requires 2.4GHz WiFi within 33 feet
- Batteries not included, alkaline only
Pros
- Keypad, smartphone, Apple Watch, and backup-key entry
- Direct 2.4 or 5 GHz Wi-Fi, no hub needed
- Scheduled codes for guests and service providers
- BHMA Grade 2 durability certification
Cons
- Remote app control limited to US and Canada
- Smart features depend on Wi-Fi connectivity
Pros
- 0.3-second fingerprint access
- Built-in WiFi, no hub required
- Permanent, one-time, and recurring PINs
- Matching handle set included
Cons
- Requires eight AA alkaline batteries
- WiFi supports 2.4GHz networks only
Start With the Door Hardware
A deadbolt replacement preserves your existing handle, while a lock with a handle gives you a coordinated front-door set. The eufy Security Smart Lock C220 is designed for most standard deadbolts and can fit bores under 54mm after removing its spacer. Handle-equipped options make more sense when you are replacing both pieces at once.
Check the door before ordering, especially if you are considering the Philips WiFi Keypad Door Lock with Handle. That model is specified for doors from 1-3/8 to 1-3/4 inches thick, so measuring first can prevent a compatibility problem.
Pro Tip: Measure the door thickness and existing deadbolt before removing hardware. Confirm whether you need a deadbolt-only lock or a handle set.
Fingerprint, Keypad, or Phone Access
Fingerprint entry is convenient for family members who do not want to carry a phone. The eufy Security Smart Lock C220 offers six entry methods, including fingerprint, app, keypad, physical key, Apple Watch, and voice control. The Philips WiFi Keypad Deadbolt with Handle lists fingerprint access in 0.3 seconds and supports permanent, one-time, periodic, and recurring codes.
Apple households have a distinct reason to consider the Aqara Smart Lock U100, Apple Home Key. It supports Apple Home Key from an iPhone or Apple Watch, stores fingerprint data locally with AES encryption, and can hold up to 50 fingerprints. Remote password configuration and broader third-party integration require an Aqara Zigbee 3.0 hub.
| Access style | Distinguishing feature | Best fit |
|---|---|---|
| Fingerprint | Fast personal entry | Busy households |
| Keypad codes | Shareable scheduled access | Guests or rentals |
| Apple Home Key | iPhone or Watch tap | Apple users |
Remote control also differs by setup. Built-in Wi-Fi appears on the eufy, Yale, and Philips models, while the Aqara lock uses a hub for several remote and third-party functions. Read what a smart lock bridge does before assuming every feature works without extra equipment.
Battery Life and Outdoor Exposure
Battery claims vary by model and usage. The eufy Security Smart Lock C220 uses eight AA batteries and lists about eight months, while the Aqara U100 uses four AA batteries and lists up to eight months. Philips lists up to six months for its handle deadbolt, and the Philips WiFi Keypad Door Lock with Handle also requires eight AA alkaline batteries.
Weather ratings matter on an exposed entry door. The Aqara U100 carries IP65 weatherproofing, while the eufy locks list IP53. The Yale deadbolt is BHMA Grade 2 certified, and the eufy and Aqara models specify BHMA Grade 3 compliance or certification. For context on voluntary safety standards, UL Solutions explains product safety standards.
Before You Mount It: Do not treat a backup key, emergency charging port, or low-battery alert as optional details. Keep the mechanical key or charging solution available before the batteries become depleted.
Expert Examined
From Dana Whitfield
I keep seeing homeowners choose remote access first and inspect the door afterward. The mistake is easy to avoid: confirm the door thickness, deadbolt format, and available handle space before deciding which smart features matter most.
Read more about Dana WhitfieldAccess Sharing Without Losing Control
Scheduled access is useful when several people need different permissions. Yale supports unlimited codes with sharing, schedules, and revocation through the Yale Access app, plus DoorSense status detection and auto-lock. Philips supports recurring and one-time codes, while eufy provides app access management and event history on the C33.
If you want a handle and remote management together, the eufy Security Smart Lock C33 suits doors such as a garage, side, office, or basement door and works with left- and right-hand doors. For broader advice about physical entry risks, read key lock box versus smart lock safety.
Which Lock Fits Your Household
I would put the eufy Security Smart Lock C220 on a standard front door when you want fingerprint entry, built-in Wi-Fi, voice control, and a physical key without adding a bridge. Its IP53 rating and BHMA Grade 3 certification also suit buyers who want a clearly specified deadbolt replacement.
I would point Apple households toward the Aqara Smart Lock U100, Apple Home Key when iPhone or Apple Watch entry is the priority. Choose the eufy Security Smart Lock C33 for a garage, side, office, or basement door where a handle set, fingerprint grip, built-in Wi-Fi, and event history are more useful than Apple Home Key.
The Bottom Line
The biggest mistake is choosing features before confirming the door hardware. A lock can have excellent access options and still be the wrong purchase if the door thickness, bore, or handle arrangement does not match.
If you only do one thing first, measure the door and identify whether you are replacing a deadbolt alone or the complete handle set. Then choose the access method your household will use most consistently.
FAQs
Fingerprint entry is convenient when household members do not want to carry phones or remember codes. Keypads are better for shared access, while Apple Home Key is a strong fit for households already using an iPhone or Apple Watch. Install it on a compatible exterior or interior door according to the product design and your access needs. Check the door thickness, bore, existing deadbolt, and handle space before installation. The listed battery life ranges from about six to eight months depending on the model and usage. Check low-battery alerts, use the specified alkaline batteries where required, and keep the backup entry method available. BHMA grading identifies a performance and durability standard for the lock hardware. The products listed specify either Grade 2 or Grade 3, so treat the stated grade as one comparison point alongside access features, fit, and weather protection.Which smart lock entry type is easiest for a family?
Where should I install a smart lock?
How often do smart lock batteries need replacement?
What does a BHMA grade mean on a smart lock?
Sources
- BHMA and ANSI standards information. buildershardware.com
- UL Solutions product safety information. www.ul.com