Digital and smart door locks are becoming a must-have in Singapore homes. Whether you’re upgrading from a traditional key lock, setting up a new BTO or managing a rental or Airbnb unit, the right lock adds both convenience and security. But with so many models and features in the market, how do you choose the right one?
This guide breaks down the types of door locks, unlocking methods, key features, factors to consider before buying and suitable digital/smart lock types to replace your existing manual lock type.
Identifying the Lock Type on Your Door
Before diving into digital lock options, it’s good to understand the basic mechanical lock structures used in your door.
- Mortise Lock
A mortise lock is a locking mechanism that is installed inside a pocket (the mortise) cut into the door edge. It typically provides higher security.
• One-piece Lever-handle Mortise Lock
A single integrated unit where the handle and lock are combined in single body.
• Two-piece Lever-handle Mortise Lock
The handle and lock appear to be separate components, this design uses separate escutcheon plates for the lever handle and key/thumb-turn mechanism.
• Vertical Pull Bar Handle with Mortise Lock
A mortise lock paired with a vertical bar handle, commonly used in modern or premium door designs.
2. Deadbolt Lock
A deadbolt is a single locking mechanism that operates independently from the door handle. Unlike a mortise lock where the handle and lock are combined into one system, a deadbolt has a separate lock body, the handle set in the below and the deadbolt positioned above it, providing an extra layer of security.
3. Rim Latch Lock
A rim latch lock is mounted on the interior side of the door, with the latch engaging into a strike plate on the frame. Unlike mortise locks, rim locks do not require cutting a pocket into the door, making them common in older HDB flats.
4. Single Latch Lock
This is one of the most basic lock types, designed with a spring-loaded latch instead of a solid bolt. The latch extends into a strike plate on the door frame to keep the door closed. On the interior side, turning a knob or pressing a button prevents the exterior handle from retracting the latch, effectively “locking” the door for privacy.
Types of Digital and Smart Locks
Different door lock structures can be digitized with smart technology. Common types in Singapore include:
• Push-Pull – Open the door with a push or pull, perfect for hands-free convenience.
• Lever Handle – Similar to traditional handle locks.
• Dead Bolt – A standalone locking mechanism for enhanced security, often paired with a separate handle set.
• Rim Latch – Surface mounted lock often found in older HDB flats.
• Single Latch – Compact design suitable for side doors, study rooms or smaller spaces.
• Retrofit Smart Lock – Fits over an existing lock, great for rentals or when you can’t modify the door.
Unlocking Methods
The main advantage of digital or smart locks is the variety of ways to unlock your door.
• Passcode – Key in a PIN to enter.
• NFC/RFID Card – Tap a card or sticker, popular among kids and the elderly.
• Fingerprint – Fast and secure, ideal for family homes.
• Face Recognition – Advanced option for high-end models.
• Palm Vein Recognition – Rare but highly secure biometric method.
• Remote Control – Unlock with a remote, useful for those with mobility needs.
• Mechanical Key – Always provided as backup.
• App Unlocking (Bluetooth/Wi-Fi) – Control via smartphone, including remote access.
Unlocking Methods for Convenience
For Airbnb hosts or families who share access:
• OTP (One-Time Password) – Temporary code for visitors.
• Scheduled PIN – Valid only during specific times.
• Guest PIN – For friends or helpers.
• Recurring PIN – For weekly access, e.g., part-time cleaners.
How to Choose the Right Lock
Not every lock fits every door. Here are the main factors to check before buying:
Limiting Factors to Consider
• Distance Between Door and Gate
In HDBs and condos, ensure you have enough space if there’s a metal gate outside. Push-pull locks may not fit in narrow gaps.
• Door Thickness
Most digital locks are designed for standard door thickness (usually 35–60mm). If your door is unusually thin or thick, you may need special fittings or a compatible lock model.
• Existing Manual Door Lock Type – Some doors already have mortise or rim locks, which will determine the compatible digital lock model.
Type of Manual Lock and Suitable Digital/Smart Lock Replacement
| TYPE OF MANUAL LOCK | SUITABLE DIGITAL/SMART LOCK REPLACEMENT |
|---|---|
| Mortise Lock |
|
| Deadbolt Lock |
|
| Single-latch Lock |
|
| Rim Latch Lock |
|
Note:
The information in this table is provided as a general reference for selecting a suitable digital or smart lock. Actual compatibility depends on your specific door type, structure and condition. We recommend sending us your door photos and measurements so we can confirm the right fit before you make a purchase.
Other Considerations
When comparing digital locks, look beyond just the unlocking method.
• User Management – Control who can access the door and track entry logs.
• Battery Life – Most last 6–12 months; low-battery alerts are common.
• Emergency Power Supply – USB cable or 9V battery terminal in case the lock runs out of power.
• Safety Features & Alarms – Intrusion alerts, High temperature alarms or auto-locking for peace of mind.
• Smart Features – Integration with smart home systems like Google Home or voice assistants, Apple home and Matter Support.
Installation & Maintenance
Getting a digital lock installed properly is just as important as choosing the right model. A poor installation can affect performance. At SmartKakis, every lock you purchase comes with professional installation at no extra charge, so you don’t have to worry about hidden costs.
We also guarantee that all our digital and smart locks are 100% genuine, giving you full warranty protection and peace of mind.
Once installed, maintenance is simple:
• Replace batteries once or twice a year.
• Test backup unlocking methods.
• Keep the emergency mechanical key in a safe but accessible place.
Final Thoughts
Choosing the right digital lock depends on your door type, lifestyle needs and budget. Families may prioritize safety and convenience, while Airbnb hosts look for flexible access management.
In Singapore, the most reliable options come from trusted brands like Häfele, Aqara, Solity and Igloohome.
By understanding the types of locks, unlocking methods and key considerations, you can confidently select the digital or smart lock that fits on your door and gate.