Tired of fumbling for keys, wondering if you locked the door, or rushing home to let someone in? Welcome to the world of smart locks, where convenience meets cutting-edge security. But not all smart locks are created equal. When we talk about a smart lock interlock system, we’re looking at solutions that offer a deeper, more integrated level of security and control, often connecting seamlessly with your smart home ecosystem and providing multiple layers of access management. These aren’t just locks; they’re comprehensive security hubs for your front door, giving you unparalleled peace of mind.
These advanced smart locks move beyond simple keyless entry, offering features like remote access, automatic locking, and detailed activity logs. They essentially create a “digital interlock” by integrating various security functions and access methods, ensuring your home is always secured the way you want it. In this guide, we’ll dive into the top 7 smart lock interlock options that are making waves for their reliability, features, and user-friendliness. Let’s find the perfect fit for your home!
1. August Home, Silver Wi-Fi Connected Smart Keyless Entry
The August Wi-Fi Smart Lock stands out for its genius approach: it transforms your existing deadbolt into a smart lock without altering your door’s exterior. This means you get all the high-tech features, like remote access and auto-unlock, while keeping your original keys and maintaining your home’s curb appeal. It’s incredibly easy to install, fitting right over your current thumbturn, making it a favorite for renters and homeowners alike who want a smart upgrade without the hassle of a full lock replacement.
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Key Features:
- Upgrades existing deadbolt on the inside of the door.
- Grant permanent, scheduled, or temporary access via the August app.
- Easy 10-minute DIY installation.
- Auto-Unlock as you approach home (optional).
- Auto-Lock and DoorSense™ ensures the door is closed and locked.
- Built-in Wi-Fi for seamless integration with Amazon Alexa, Google Assistant, Apple HomeKit, Samsung SmartThings.
- Award-winning design and functionality (CNET Editor’s Choice, Good Housekeeping, Tom’s Guide).
- Maintains exterior curb appeal.
- Optional Smart Keypad and biometric recognition (sold separately) for enhanced access.
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Pros:
- Non-invasive installation, keeps existing keys and exterior look.
- Robust smart home ecosystem integration with built-in Wi-Fi.
- Auto-unlock and DoorSense™ provide superior convenience and security.
- User-friendly app for access management.
- Renter-friendly design.
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Cons:
- Keypad and biometric features require separate purchases.
- Relies on your existing deadbolt’s mechanical integrity.
User Impressions: Customers rave about the August Wi-Fi Smart Lock’s effortless installation and the convenience of auto-unlocking. Many appreciate that they don’t have to change their door’s appearance, and the deep integration with smart home platforms is a big hit, offering a truly interconnected smart lock interlock experience.
2. Smart Door Lock with Knob, LinkThai Keyless Entry
For those seeking a versatile and budget-friendly entry into keyless living, the LinkThai Smart Door Lock offers an impressive 5-in-1 unlocking experience. This knob-style smart lock is incredibly simple to install, often in less than 10 minutes with just a screwdriver, making it a fantastic DIY project. Its robust aluminum alloy construction ensures durability, and the multiple access methods – from fingerprint to key fobs – mean you’ll never be locked out.
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Key Features:
- 5-in-1 unlocking methods: Password, Key Fob, APP, Fingerprint, and physical Key.
- Quick installation (under 10 minutes).
- Constructed from durable aluminum alloy for enhanced security.
- Supports up to 50 unique user codes and fingerprints.
- Ability to generate one-time codes for guests.
- Bluetooth connectivity for app control within 16ft.
- Automatic locking function with adjustable timer via app.
- Includes a 30-day money-back guarantee, 2-year warranty, and lifetime support.
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Pros:
- Multiple unlocking options offer great flexibility.
- Very easy and quick to install.
- Excellent customer service and warranty.
- Guest code generation is very convenient.
- Affordable entry point into smart home security.
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Cons:
- App control is limited to Bluetooth range (16ft), not remote Wi-Fi.
- Requires 4 AAA batteries, not included.
User Impressions: Users love the sheer number of ways to unlock this device and its simple, straightforward installation. The fingerprint reader is often highlighted for its speed and accuracy, and the ability to issue temporary codes for visitors is a huge plus. It’s seen as a reliable and accessible smart lock for everyday use.
3. eufy Security Smart Lock C30, Keyless Entry, Built-in WiFi
The eufy Security Smart Lock C30 delivers true remote control right out of the box, thanks to its built-in Wi-Fi — no extra bridge required! This sleek deadbolt replacement combines convenience with robust security, featuring durable physical buttons that are more reliable than touchscreens and an auto-lock function that ensures your door is always secured, even if you forget. It’s designed for effortless integration into your eufy smart home ecosystem, offering a complete smart lock interlock solution.
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Key Features:
- Built-in Wi-Fi for remote control and monitoring via eufy Security app (no bridge needed).
- Multiple unlocking methods: physical key, voice commands (Alexa/Google Assistant), physical buttons.
- Durable physical buttons for enhanced reliability and error resistance.
- Auto-lock function with adjustable timer, regardless of door position.
- Easy 15-minute DIY installation, no drilling required.
- Seamless integration with eufy doorbell for smart routines.
- Powered by 4 AA batteries with up to 5 months battery life and low battery indicator.
- Wide operating temperature range (-22℉ to 158℉) and IPX3 waterproofing.
- Wrong-try protection temporarily locks the system after multiple incorrect attempts.
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Pros:
- True remote access with built-in Wi-Fi, eliminating need for a separate hub.
- Highly durable and reliable physical buttons.
- Excellent battery life for a Wi-Fi enabled lock.
- Strong security features, including wrong-try protection.
- Integrates well with other eufy security products.
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Cons:
- AA batteries not included.
- IPX3 waterproofing is suitable for splashes but not heavy rain.
User Impressions: Customers consistently praise the eufy C30 for its hassle-free built-in Wi-Fi and robust build quality. The reliability of the physical buttons over touchpads is a common highlight, and the seamless integration with other eufy devices makes it a favorite for those building a unified smart home security system.
4. August Home Smart Lock, 3rd Generation – Silver
The August Home Smart Lock (3rd Gen) offers the core August experience of upgrading your existing deadbolt with smart features, without the built-in Wi-Fi of its newer counterpart. It keeps your door’s exterior unchanged while providing incredible convenience and peace of mind. Its Auto-Unlock feature senses your arrival, freeing up your hands, and DoorSense confirms your door is closed and locked. This version is particularly appealing for renters, as it can be easily removed and reinstalled when you move.
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Key Features:
- Replaces the inside thumbturn of your existing deadbolt.
- Control lock/unlock with the August app on your phone or Apple Watch.
- Auto-Unlock as you arrive home (optional feature).
- Auto-Lock with DoorSense™ ensures the door is secured after closing or a set time.
- Simple 10-minute installation over most single-cylinder deadbolts.
- Renter-friendly – easily remove and reinstall when moving.
- Maintains the original look of your front door’s exterior.
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Pros:
- Incredibly easy and non-invasive installation.
- Ideal for renters or those who don’t want to change their door’s aesthetics.
- Auto-unlock and DoorSense™ add significant convenience and security.
- Compatible with Apple Watch for quick access.
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Cons:
- Does not have built-in Wi-Fi; requires a separate August Wi-Fi Connect Bridge (sold separately) for remote access and voice assistant integration.
- Fewer advanced features compared to the Wi-Fi connected version.
User Impressions: Users frequently commend the 3rd Gen August lock for its simplicity and the ability to keep their existing keys. Renters especially love its non-permanent nature. While some miss the built-in Wi-Fi, many find the auto-unlock and DoorSense™ features alone make it a worthwhile upgrade for everyday convenience.
5. eufy Security Smart Lock C220, Fingerprint Keyless Entry
The eufy Security Smart Lock C220 takes convenience to the next level with its self-learning AI fingerprint recognition, promising an unlock in less than 1.5 seconds that gets more precise with every use. Coupled with an impressive 8-month battery life and built-in Wi-Fi, this lock offers a truly premium and reliable smart lock interlock solution. Its 6-way unlocking options provide ultimate flexibility, making fumbling for keys a thing of the past.
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Key Features:
- Long-lasting 8-month battery life (with 8 AA batteries).
- Self-learning AI Fingerprint recognition for fast (under 1.5s) and precise unlocking.
- 6 ways to unlock: Fingerprint, eufy Security app, Keypad, Physical Key, Apple Watch, Alexa/Google Voice Assistant.
- Built-in Wi-Fi for remote control and monitoring (no bridge required).
- Control from anywhere with access management, real-time notifications, and event history.
- Integrates with the eufy ecosystem (e.g., eufy doorbell).
- Easy 15-minute installation compatible with most standard US&CA deadbolts.
- Security features include alarms for unusual attempts, wide operating temperature range (-22℉ to 158℉), and IP53 waterproof rating.
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Pros:
- Exceptional battery life for a Wi-Fi smart lock.
- Fast, accurate, and self-improving fingerprint recognition.
- Comprehensive array of unlocking methods for maximum flexibility.
- True remote access with built-in Wi-Fi.
- Robust security features and good weather resistance.
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Cons:
- Requires 8 AA batteries, which might be a lot for some users.
- Battery life can vary based on usage frequency.
User Impressions: This smart lock earns high praise for its lightning-fast and reliable fingerprint sensor. Users are also impressed by the extensive battery life and the convenience of having so many unlocking options. The built-in Wi-Fi is a major selling point, providing a seamless and comprehensive smart entry experience.
6. August Home Smart Lock – Keyless Home Entry with Your
Similar to other August models, this smart lock focuses on transforming your existing deadbolt into a smart one, preserving your home’s exterior aesthetic. What makes this particular offering shine is its direct integration capabilities, especially with Alexa, allowing for voice control, status checks, and even low battery notifications. It also features August’s unique DoorSense™ technology, which tells you if your door is securely closed and locked, adding an extra layer of peace of mind to your home security.
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Key Features:
- Connects to Alexa for voice control (lock, unlock, status) and low battery notifications.
- Attaches to your existing deadbolt on the inside, keeping your original keys.
- Installs in under 10 minutes with just a screwdriver.
- Grant unlimited, temporary, or scheduled access to friends, family, or service providers.
- Features DoorSense™, a sensor that indicates if your door is closed and locked.
- Auto-unlock as you arrive and auto-lock after closing.
- Requires an August Wi-Fi Connect Bridge (sold separately) for remote access and Alexa integration.
- August Smart Keypad (sold separately) for code entry.
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Pros:
- Extremely easy and quick installation, preserving original keys and exterior.
- Flexible access management for multiple users.
- DoorSense™ provides crucial security feedback.
- Convenient auto-unlock and auto-lock features.
- Good integration with Alexa (with separate bridge).
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Cons:
- Wi-Fi Connect Bridge and Smart Keypad are additional purchases for full smart functionality.
- Not a complete replacement deadbolt, relies on your existing lock’s mechanism.
User Impressions: Customers love the non-invasive nature of this August lock and the simplicity it brings to their daily routine. The DoorSense feature is particularly valued for its ability to confirm the door’s status, and many find the flexible guest access a standout feature for managing visitors and service providers.
7. Philips Wi-Fi Door Lock, WiFi Smart Lock Keyless Entry
The Philips Wi-Fi Door Lock brings a reputable brand’s quality to the smart home security realm. With built-in Wi-Fi, it allows for remote control from anywhere without needing an extra hub, and its five flexible unlocking methods ensure everyone in the family has a convenient way to enter. Its “Away Mode” and instant notifications provide enhanced security, making it a robust smart lock interlock system for comprehensive home protection.
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Key Features:
- Built-in Wi-Fi for remote lock/unlock from anywhere (no extra hub needed).
- Flexible unlocking methods: app, passcode, fingerprint, physical key, voice via Alexa/Google Assistant.
- Instant fingerprint unlock for quick access.
- Create up to 100 custom passcodes (one-time or scheduled).
- Auto-lock feature with adjustable timer (10 to 180 seconds).
- Instant notifications for door activity and full history logs.
- “Away Mode” disables all unlock methods except master code for enhanced security during trips.
- Easy installation (fits most doors 1-3/8″ to 2″ thick) with just a screwdriver.
- US-based customer service for timely support.
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Pros:
- True remote access with integrated Wi-Fi.
- Highly versatile with 5 unlocking methods, including fast fingerprint.
- Excellent guest and user code management capabilities.
- Away Mode offers significant security benefits when traveling.
- Reliable brand with good customer support.
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Cons:
- Batteries are not included.
- Requires checking door thickness for compatibility before purchase.
User Impressions: Users praise the Philips Wi-Fi Door Lock for its reliable built-in Wi-Fi and the smooth, quick response of its fingerprint reader. The ability to manage a large number of user codes and the “Away Mode” are frequently highlighted as top features for security-conscious homeowners.
Frequently Asked Questions (FAQ)
Q1: What exactly is a “smart lock interlock” system?
A: While “interlock” often refers to mechanical systems, in the context of smart locks, a “smart lock interlock” refers to an advanced smart lock system that provides comprehensive, integrated security features. This includes multiple layers of access control (fingerprint, keypad, app, voice), seamless connectivity (Wi-Fi, Bluetooth), and often the ability to interact with other smart home devices (like door sensors or cameras) to create a more robust and responsive security solution for your home. It’s about creating a holistic, interconnected approach to entry management.
Q2: How do smart locks enhance home security compared to traditional locks?
A: Smart locks offer several security enhancements: they eliminate the risk of lost or copied keys, provide real-time activity logs, allow remote monitoring and control, and often include features like auto-locking and wrong-try alarms. Many also integrate with smart home systems, letting you create routines that enhance security, like turning on lights when the door unlocks after dark.
Q3: Are smart locks difficult to install for a DIYer?
A: Most modern smart locks are designed for easy, DIY installation, often requiring only a screwdriver and about 10-20 minutes of your time. Many replace existing deadbolts without needing new holes, making the process straightforward. However, it’s always wise to check your door’s specifications (thickness, backset) against the lock’s requirements.
Q4: What are the different ways to unlock a smart lock?
A: Smart locks offer a variety of unlocking methods, providing convenience and flexibility. Common methods include: using a smartphone app (via Bluetooth or Wi-Fi), entering a code on a keypad, fingerprint recognition, using a physical key (as a backup), key fobs, and voice commands through smart assistants like Alexa or Google Assistant.
Q5: Do smart locks work without Wi-Fi?
A: Many smart locks use Bluetooth for local control via your smartphone. However, for remote access (controlling your lock when you’re not home), real-time notifications, or integration with voice assistants, a Wi-Fi connection is usually required. Some locks have built-in Wi-Fi, while others need a separate Wi-Fi bridge or hub.
Q6: What is ‘Auto-Lock’ and ‘DoorSense™’?
A: Auto-Lock is a feature that automatically locks your door after a set period (e.g., 30 seconds or 5 minutes) once it’s closed, ensuring you never forget to lock up. DoorSense™ (specific to August locks but similar features exist) is a sensor that tells you if your door is securely closed or if it’s been left ajar, providing an extra layer of peace of mind.
Q7: How do I choose the best smart lock for my home?
A: Consider your priorities: Do you need remote access (Wi-Fi vs. Bluetooth)? Do you want fingerprint access, a keypad, or just app control? What’s your budget? Do you want to keep your existing keys? Think about compatibility with your current smart home ecosystem (Alexa, Google Home, Apple HomeKit) and the ease of installation. Reading user reviews and checking specific features against your needs is key to making the best choice.