Choosing a smart lock is easier when you focus on the features that matter most: installation type, access methods, smart home compatibility, battery life, security, and budget. The right smart lock for one door may be very different from the best choice for another — your decision should be based on your specific needs, habits, and home setup.
What to Consider When Choosing a Smart Lock
| Factor | What to Look For |
|---|---|
| Installation Type | Replacement (full lock swap) or retrofit (over existing lock) |
| Access Methods | App, keypad, fingerprint, physical key, hands-free UWB |
| Smart Home Compatibility | Alexa, Google Home, Apple HomeKit, Matter, IFTTT |
| Battery Life | 3–12 months depending on usage and connectivity |
| Security | Grade 1 or Grade 2 rating, encryption, physical key backup |
| Price | $80–$400+ |
| Door Compatibility | Backset, cross bore, door thickness |
1. Installation Type: Replacement vs Retrofit
Replacement Locks
Replacement locks require removing your existing deadbolt and installing a completely new lock. This is the most common type and includes brands such as Yale, Schlage, Level, Eufy, and Wyze. Replacement locks offer the most integrated experience and are available in the widest range of styles and features.
Best for: Homeowners who can modify their door hardware and want a fully integrated smart lock.
Retrofit Locks
Retrofit locks install over your existing deadbolt on the inside of your door. They keep your exterior hardware unchanged, which is perfect for renters or anyone who wants to keep their existing keys. The August Wi-Fi Smart Lock is the best example.
Best for: Renters, apartment dwellers, and anyone who cannot change their exterior lock hardware.
2. Access Methods
Smart locks offer various ways to unlock your door:
Smartphone App
Most smart locks can be controlled via a smartphone app, allowing you to lock and unlock remotely, grant guest access, and monitor activity. This is the most common access method and is included with all smart locks.
Keypad
Keypad locks use a numerical PIN for entry. They are simple, reliable, and work in all weather conditions. Keypad access is useful for guests, family members without smartphones, or backup access.
Fingerprint
Fingerprint sensors offer the fastest physical unlock method — just press your finger and the lock opens. This is ideal for households where multiple people need access.
Physical Key Backup
Most smart locks include a physical key backup for emergencies. This is essential for peace of mind and ensures you can always get in, even if the batteries die.
Hands-Free UWB Auto-Unlock
Ultra-wideband (UWB) technology allows a lock to sense your phone as you approach and unlock automatically without you touching anything. The Schlage Sense Pro is the leading example.
3. Smart Home Compatibility
Before buying, check which smart home platforms the lock supports:
- Apple HomeKit / HomeKey: Schlage Encode Plus, Level Lock Pro, August Wi-Fi Smart Lock
- Google Home: Yale Assure Lock 2, August Wi-Fi Smart Lock, Eufy E32
- Amazon Alexa: Yale Assure Lock 2, August Wi-Fi Smart Lock, Schlage Encode Plus
- Matter / Thread: Level Lock Pro, Eufy E32
- Samsung SmartThings: Yale Assure Lock 2, Schlage Encode Plus
If you already use a smart home platform, choose a lock that integrates with it for automation and voice control.
4. Battery Life
Battery life varies significantly by lock model and usage:
- Wyze Lock Bolt V2: Up to 8 months (8 AA batteries)
- Eufy Smart Lock E32: Up to 8 months (8 AA batteries)
- August Wi-Fi Smart Lock: ~3 months (4 AA batteries)
- Yale Assure Lock 2: Varies by model; up to 1 year for Bluetooth version
- Schlage Encode Plus: 8–12 months (4 AA batteries)
- Level Lock Pro: CR2 battery
Most locks provide low-battery alerts through their companion apps, giving you time to replace batteries before they die.
5. Security Considerations
Security Grade
Look for locks with ANSI/BHMA Grade 1 or Grade 2 ratings. Grade 1 is the highest residential security rating and is used by locks such as the Schlage Encode Plus and Yale Assure Lock 2.
Encryption
Choose a lock with robust encryption (AES-128 or AES-256) to protect your data and prevent unauthorized access.
Physical Key Backup
A physical key backup is essential for peace of mind. It ensures you can always get in, even if the batteries die or the electronics fail.
Tamper Alarms
Some locks include tamper alarms that sound if someone attempts to force the lock or remove it from the door.
6. Cost and Price Range
Smart locks range from around $80 to over $400:
- Budget ($80–$150): Wyze Lock Bolt V2, Amazon Basics, basic keypad models
- Mid-Range ($150–$250): Yale Assure Lock 2, Eufy Smart Lock E32, August Wi-Fi Smart Lock
- Premium ($250–$400+): Schlage Encode Plus, Level Lock Pro, Schlage Sense Pro
Higher-priced locks generally offer better build quality, more features, and higher security ratings, but mid-range options often provide excellent value.
7. Door Compatibility
Check these door dimensions before buying a smart lock:
- Backset: The distance from the edge of the door to the center of the deadbolt hole. Standard is 2⅜ or 2¾ inches.
- Cross Bore: The circular hole through the door face. Standard is 2⅛ inches.
- Door Thickness: Most locks fit 1⅜ to 1¾ inches.
If your door uses non-standard dimensions, you may need to drill new holes or choose a lock that specifically accommodates your door.
8. Renter Considerations
If you’re a renter, look for:
- Retrofit Locks: These install over your existing deadbolt without changing the exterior hardware, so your landlord likely won’t object.
- Reversible Installation: Can you reinstall the original lock when you move out?
- No Drilling Required: Avoid locks that require modifying the door or frame.
The August Wi-Fi Smart Lock is the best choice for renters because it keeps the exterior hardware unchanged and is easily reversible.
9. Wi-Fi vs Bluetooth Only
Wi-Fi
Wi-Fi allows remote access from anywhere in the world. It also enables smart home integration, voice assistant control, and notifications. The trade-off is shorter battery life and higher cost.
Bluetooth
Bluetooth works for local control from your smartphone, but you can’t access the lock remotely without a bridge or Wi-Fi connection. Battery life is longer and the lock is often cheaper.
10. Brand and Reputation
Stick with well-established smart lock brands with good track records:
- Schlage: High security, reliable, Grade 1 locks
- Yale: Versatile, modular, excellent app
- August: Best for renters, easy installation
- Level: Invisible design, premium quality
- Eufy: Good value, fingerprint options, Matter support
- Wyze: Best budget options
Frequently Asked Questions
Which smart lock is the most secure?
Schlage Encode Plus and Yale Assure Lock 2 are among the most secure, with Grade 1 security ratings and enterprise-grade encryption.
Can a smart lock be hacked?
Yes, any connected device can be vulnerable to hacking. To minimize risk, use strong passwords, enable 2FA, keep firmware updated, and choose a lock from a reputable brand with robust encryption.
Do I need a hub for a smart lock?
Many smart locks have built-in Wi-Fi, so a separate hub is not needed. Some models require a bridge or hub for remote access, especially older models with Z-Wave or Zigbee.
How long do smart lock batteries last?
Battery life varies from 3 months to over a year, depending on usage, connectivity, and lock model. Wi-Fi models typically have shorter battery life than Bluetooth-only models.
Are smart locks worth it?
For most people, yes. The convenience of remote access, guest codes, and smart home integration is a significant upgrade over traditional locks. However, they are more expensive and require ongoing maintenance (battery replacement).
Final Thoughts
Start with installation type: replacement or retrofit. Then consider access methods, smart home compatibility, battery life, security, and budget.
For most homeowners, a Wi-Fi-enabled smart lock with keypad, smartphone app, and physical key backup offers the best balance. For renters, a retrofit lock such as the August Wi-Fi Smart Lock is the safest choice.
Choose a reputable brand with strong security and a good app. The best smart lock is the one that fits your door, your smart home, and your lifestyle.