5 Best Digital Gate Lock for HDBs & Condos in Singapore (2026)

Quick verdict: best digital gate locks in Singapore for 2026

Best for Security: Interlock Mercury G4
Choose the Mercury G4 if your top priority is emergency access backup and maximum gate security. Its key advantage is Interlock’s DualKey™ design, which provides physical key access from both the indoor and outdoor sides of the gate. This makes it especially suitable for families, elderly users, rental units, and homeowners who want stronger backup access beyond electronic unlocking alone.

Best Overall Features: Interlock Mercury G3
Choose the Mercury G3 if you want the most complete smart gate lock experience. It combines palm vein recognition, facial recognition, smart access, and dual-camera viewing. One camera is useful for visitor viewing, while the second camera helps with lower-angle parcel checks for Shopee, Lazada, TikTok Shop, food delivery, and courier drop-offs.

Best Value Budget: Interlock Mercury G2
Choose the Mercury G2 if you want a practical smart gate lock with strong modern access features, but do not need the highest-tier camera setup or Interlock’s DualKey™ system. It is a strong value option for HDB and condo homeowners who want palm vein recognition, facial recognition, and single-camera viewing at a more accessible level.

Best Smart Home: Aqara U500
Choose the Aqara U500 if your priority is smart-home ecosystem support. It is a gate-focused Aqara smart lock with Apple Home Key, Matter over Thread, NFC, PIN codes, fingerprint access, app control, and automation support. However, it does not offer palm vein recognition, facial recognition, or built-in camera viewing like the Mercury G-series locks.

Best Push-Pull Gate Lock Feel: Solity G1
Choose the Solity G1 if you prefer a push-pull mortise gate lock feel instead of a more standard gate lock operation. It is a strong option for homeowners who like a premium handle experience and want a feature-rich smart gate lock with a more door-like opening feel.

Digital gate lock comparison table

Use this table if you want a quick side-by-side comparison before reading the detailed reviews below.

This table compares the Interlock Mercury G4, Interlock Mercury G3, Interlock Mercury G2, Aqara U500, and Solity G1 based on access methods, camera viewing, smart-home support, push-pull feel, and the main reason to choose each model.

Shopping by category helps too: digital gate locks, Interlock Mercury series, Aqara locks, Solity locks, and door and gate lock bundles.

What matters most when choosing a digital gate lock in Singapore?

1. Gate compatibility comes first

Not every digital lock can fit every metal gate. HDB and condo gates can differ in bar spacing, gate thickness, lockcase position, privacy panel design, clearance from the wooden door, and how the existing gate lock is mounted. Before choosing a model, always confirm whether your gate has enough space for the lock body, handle movement, strike alignment, and emergency access points.

This is why the “best” digital gate lock is not only about the feature list. It also has to mount neatly, lock consistently, and avoid creating awkward gaps or clearance issues after installation.

2. Security is not just about having more unlock methods

Many homeowners compare digital gate locks by counting unlock methods, but real security also depends on backup access, physical construction, auto-lock behaviour, user management, battery backup, and what happens during electronic failure. This is where a security-focused model like Mercury G4 stands out because Interlock’s DualKey™ design provides physical key access from both sides of the gate.

3. Camera viewing is becoming more important

With more households receiving frequent online deliveries, gate visibility is now a major buying factor. A camera gate lock can help you check who is at the gate, whether a parcel was left outside, and whether there is motion near your entrance. If parcel visibility is important, Mercury G3 has the strongest visibility angle because of its dual-camera viewing concept.

4. Palm vein and facial recognition can be easier than fingerprint alone

Fingerprint access is convenient, but it may not work equally well for everyone, especially seniors, children, or users with worn or dry fingerprints. Palm vein and facial recognition give households more flexible biometric options, which can make daily unlocking easier across different family members.

5. Smart-home integration is a separate priority

If you are building around Apple Home, Google Home, Alexa, SmartThings, Home Assistant, or Matter over Thread, the Aqara U500 is the strongest smart-home option in this list. However, smart-home support does not automatically mean it has the most security or camera features. For example, the U500 has Matter support and Apple Home Key, but it does not have palm vein recognition, facial recognition, or built-in camera viewing.

6. Push-pull feel changes the daily experience

Some homeowners prefer a push-pull gate lock because it feels closer to opening a door handle instead of operating a standard gate lock. If handle feel and ergonomics matter to you, Solity G1 is worth shortlisting.

7. Daily use matters more than one-time specs

The best gate lock is the one your family can use confidently every day. Think about who will unlock it most often: children, elderly parents, helpers, tenants, delivery situations, or visitors. A powerful feature list is only useful if the lock is easy to use in real life.

Full reviews: best digital gate locks in Singapore

1) Interlock Mercury G4 — Best for Security

The Interlock Mercury G4 is the best choice if your main concern is security, emergency access, and reducing lockout risk. Its biggest difference is Interlock’s DualKey™ design, which provides mechanical key access from both the indoor and outdoor sides of the gate.

Most smart gate locks focus heavily on electronic access, such as fingerprint, PIN, card, app, or facial recognition. The Mercury G4 adds another layer of reassurance by keeping true physical key backup available from both sides. This is especially useful for households with elderly parents, helpers, tenants, children, or anyone who wants a stronger backup method in case of battery depletion or electronic issues.

On top of the DualKey™ design, the Mercury G4 also supports facial recognition, palm vein recognition, fingerprint access, PIN code, NFC card/tag, WiFi remote unlocking, mobile video intercom, and motion detection alerts. It is a security-first gate lock, but it still keeps the modern smart features most homeowners expect in 2026.

Best for:

• Families who want stronger emergency access backup.
• HDB and condo owners who worry about being locked out.
• Homes with elderly users, helpers, tenants, or frequent visitors.
• Homeowners who want palm vein, facial recognition, and physical backup access.

Pros:

• Interlock’s DualKey™ design gives mechanical key access from both indoor and outdoor sides.
• Palm vein and facial recognition for advanced biometric access.
• Single camera viewing with mobile video intercom.
• WiFi remote unlocking and motion alerts.
• Designed for Singapore metal gate environments.

Cons:

• Does not have the dual-camera parcel-viewing setup of Mercury G3.
• Best suited for users who value security backup more than maximum camera coverage.

Choose Mercury G4 if…
You want the most security-focused smart gate lock, especially if indoor and outdoor mechanical key backup matters to you.

Helpful next links: view Mercury G4

2) Interlock Mercury G3 — Best Overall Features

The Interlock Mercury G3 is the best overall digital gate lock if you want the richest feature set for daily Singapore home use. It combines advanced biometric access, smart unlocking, visitor viewing, and parcel awareness in one gate lock.

The main highlight is its dual-camera viewing concept. One camera helps you view visitors at the gate, while the second camera helps you see the lower floor or parcel area. This matters a lot for modern households that receive deliveries from Shopee, Lazada, TikTok Shop, food delivery platforms, and couriers.

The Mercury G3 is also strong for daily convenience because it supports palm vein recognition and facial recognition. These methods can be easier for households where fingerprint access is inconsistent, especially for seniors, children, or users with dry or worn fingerprints.

Best for:

• Homeowners who want the most complete gate lock feature set.
• Families with frequent parcel and food deliveries.
• HDB and condo owners who want visitor viewing and floor-level parcel awareness.
• Users who want palm vein and facial recognition in one lock.

Pros:

• Dual-camera viewing for visitor and parcel/floor awareness.
• Palm vein and facial recognition for convenient biometric access.
• Useful for households with frequent deliveries.
• Strong all-round balance of access, visibility, and convenience.

Cons:

• Does not have the same Interlock DualKey™ positioning as Mercury G4.
• May be more feature-rich than what simple households need.

Choose Mercury G3 if…
You want the best overall smart gate lock experience, especially if visitor viewing and parcel checking matter to your household.

Helpful next links: view Mercury G3 and browse digital gate locks.

3) Interlock Mercury G2 — Best Value Budget

The Interlock Mercury G2 is the best value option for homeowners who want modern smart gate lock features without paying for the highest-tier security or camera setup.

It is a practical choice for HDB and condo homeowners who want a smart gate lock with biometric convenience, facial recognition, palm vein recognition, and single-camera viewing, but do not necessarily need Mercury G3’s dual-camera parcel-viewing setup or Mercury G4’s Interlock DualKey™ positioning.

For many first-time buyers, Mercury G2 hits the right balance: it feels modern, offers strong daily convenience, and keeps the overall purchase more budget-friendly compared with the flagship models.

Best for:

• First-time digital gate lock buyers.
• HDB owners who want strong features without overspending.
• Families who want palm vein and facial recognition at a better value tier.
• Homeowners who want camera viewing but do not need dual-camera coverage.

Pros:

• Best value among the Mercury smart gate lock options.
• Palm vein and facial recognition support.
• Single-camera viewing for basic gate awareness.
• Suitable for practical HDB and condo upgrades.

Cons:

• Does not offer dual-camera parcel viewing like Mercury G3.
• Does not have the same Interlock DualKey™ security positioning as Mercury G4.
• Not as strong for smart-home ecosystem integration as Aqara U500.

Choose Mercury G2 if…
You want the best balance of price, biometric access, camera viewing, and everyday convenience.

Helpful next links: view Mercury G2 and most affordable digital locks.

4) Aqara U500 — Best Smart Home Digital Gate Lock

The Aqara U500 is the best choice if smart-home integration is your main priority. Unlike the older Aqara U100, which was better known as a smart deadbolt that could be adapted for selected setups, the Aqara U500 is designed for metal gates and grille gates.

Its biggest advantage is ecosystem support. The Aqara U500 supports Apple Home Key, Matter over Thread, NFC, PIN codes, fingerprint access, Bluetooth app control, remote unlocking with a compatible hub or Thread-enabled Matter controller, and integration with major smart-home platforms.

This makes it especially attractive for homeowners already using Apple Home, Aqara devices, Google Home, Alexa, Samsung SmartThings, or Home Assistant. If your ideal setup is to unlock with iPhone or Apple Watch, create automations, manage users through an app, and connect your gate lock into a wider smart-home system, U500 is the strongest option in this list.

However, the U500 is not the best choice if you want built-in camera viewing, facial recognition, or palm vein recognition. Compared with Mercury G3, G4, and G2, it is more of a smart-home ecosystem lock than a camera or advanced-biometric gate lock.

Best for:

• Apple Home and Apple Home Key users.
• Smart-home enthusiasts using Matter over Thread.
• Homeowners who want Aqara ecosystem integration.
• Users who prefer fingerprint, PIN, NFC, app, and automation-based access.

Pros:

• Apple Home Key support.
• Matter over Thread compatibility.
• Designed for metal gates and grille gates.
• Dual-side fingerprint access.
• Temporary, scheduled, and recurring PIN code support.
• Works well for smart-home automation when paired with the right setup.

Cons:

• No built-in camera viewing.
• No palm vein recognition.
• No facial recognition.
• Remote unlocking and ecosystem features may require compatible Aqara hubs, Thread border routers, or Matter controllers.

Choose Aqara U500 if…
You want the best smart-home gate lock, especially for Apple Home Key, Matter over Thread, and Aqara ecosystem integration.

Helpful next links: view Aqara U500, browse Aqara locks, and Aqara door and gate lock bundle.

5) Solity G1 — Best Push-Pull Gate Lock Feel

The Solity G1 is the best option in this list if you specifically want a push-pull mortise smart gate lock feel. Instead of choosing based mainly on cameras, palm vein recognition, or smart-home ecosystem support, Solity G1 appeals to homeowners who care about handle ergonomics and a more premium opening experience.

For some homeowners, this matters because the gate is used many times a day. A push-pull design can feel more natural and door-like compared with a standard gate lock operation. This makes Solity G1 especially suitable for homeowners who want their metal gate to feel more premium, not just more digital.

The Solity G1 is also a feature-rich smart gate lock, with access methods such as face recognition, fingerprint, PIN, RFID card, mechanical key, and app access depending on the current kit/version. However, it is not the strongest choice in this article if your priority is dual-camera parcel viewing, palm vein recognition, Apple Home Key, or Matter over Thread.

Best for:

• Homeowners who prefer a push-pull mortise gate lock feel.
• Users who want a more premium handle experience.
• HDB or condo owners who value daily ergonomics and smooth operation.
• Homeowners comparing Solity against Mercury and Aqara options.

Pros:

• Push-pull mortise gate lock feel.
• Premium, door-like opening experience.
• Feature-rich access options depending on current kit/version.
• Strong option for homeowners who prioritise ergonomics over camera or ecosystem features.

Cons:

• No dual-camera parcel-viewing positioning like Mercury G3.
• No Interlock DualKey™ security positioning like Mercury G4.
• No palm vein recognition positioning like the Mercury G-series models.
• Not as strong for Apple Home Key or Matter over Thread as Aqara U500.

Choose Solity G1 if…
You want a smart gate lock with a premium push-pull feel and are less concerned about camera viewing, palm vein recognition, or deep smart-home integration.

Helpful next links: view Solity G1 and browse Solity locks.

60-second decision checklist

If you are still unsure, choose based on your top priority:

• Choose Mercury G4 if you want the strongest security and emergency access backup.
• Choose Mercury G3 if you want the best overall feature set with dual-camera visitor and parcel viewing.
• Choose Mercury G2 if you want the best value option with palm vein recognition, facial recognition, and single-camera viewing.
• Choose Aqara U500 if you want Apple Home Key, Matter over Thread, and stronger smart-home ecosystem support.
• Choose Solity G1 if you want the most premium push-pull gate lock feel.

In simple terms: G4 is for security, G3 is for features, G2 is for value, U500 is for smart-home integration, and Solity G1 is for push-pull feel.

FAQ: best digital gate lock Singapore

What is the best digital gate lock for HDB in Singapore?

For most HDB homeowners, the best digital gate lock depends on your priority. Mercury G4 is best for security, Mercury G3 is best for overall features, Mercury G2 is best for value, Aqara U500 is best for smart-home integration, and Solity G1 is best for push-pull gate lock feel.

Which digital gate lock is best for security?

Interlock Mercury G4 is the best security-focused option because Interlock’s DualKey™ design provides physical key access from both the indoor and outdoor sides, together with palm vein recognition, facial recognition, app access, and mobile video intercom.

Which digital gate lock is best for parcels and deliveries?

Interlock Mercury G3 is the best choice for parcel awareness because it has dual-camera viewing. One camera is useful for visitor viewing, while the second camera helps check the lower floor or parcel area.

Which digital gate lock is best for Apple Home users?

Aqara U500 is the best choice for Apple Home users because it supports Apple Home Key and Matter over Thread. It is suitable for homeowners who want their gate lock to integrate into a wider smart-home setup.

Which digital gate lock has the best push-pull feel?

Solity G1 is the best option in this list if you want a push-pull mortise smart gate lock feel. It is suitable for homeowners who prefer a more premium, door-like handle experience on their metal gate.

Does Aqara U500 have facial recognition or palm vein recognition?

No. Aqara U500 focuses more on fingerprint, PIN, NFC, Apple Home Key, Matter, and smart-home integration. If you want palm vein recognition or facial recognition, consider the Interlock Mercury G-series instead.

Does Aqara U500 have a camera?

No. Aqara U500 does not have built-in camera viewing. If camera viewing is important, Mercury G3, G4, or G2 may be more suitable depending on whether you prioritise dual-camera viewing, security backup, or value.

Do I need to check gate compatibility before buying?

Yes. Metal gates vary in frame thickness, bar spacing, privacy panels, door-to-gate clearance, and lock position. Always send photos for compatibility assessment before confirming a digital gate lock.

Can I install a digital gate lock on any HDB metal gate?

Not always. Some gates may have limited space, unusual lock positioning, privacy panels, narrow frame clearance, or insufficient door-to-gate distance. A proper compatibility check is recommended before purchase.

Which is better: Mercury G3 or Mercury G4?

Choose Mercury G3 if you want the best overall feature set and dual-camera parcel viewing. Choose Mercury G4 if your top priority is security and Interlock’s DualKey™ mechanical backup access from both sides of the gate.

Which is better: Mercury G-series or Aqara U500?

Choose the Mercury G-series if you want advanced biometric features such as palm vein recognition, facial recognition, and camera viewing. Choose Aqara U500 if you want stronger smart-home integration, Apple Home Key, and Matter over Thread support.

Which is better: Mercury G-series or Solity G1?

Choose the Mercury G-series if you want palm vein recognition, facial recognition, camera viewing, or security-focused backup access. Choose Solity G1 if you prefer a push-pull mortise gate lock feel and a more premium handle experience.

Next steps: check compatibility before buying

Before choosing a digital gate lock, take clear photos of your gate so the installation team can assess compatibility properly.

Please prepare:

• Full front view of your gate when closed.
• Full rear view of your gate when closed.
• Side view of the existing gate lock area.
• The fixed gate frame or strike-hole area.
• The distance between your wooden door and metal gate.
• Any privacy panel, vertical handlebar, glass panel, or unusual gate design.

If you are unsure which model fits your home, send your gate photos to Interlock for a compatibility check before ordering.

Helpful links: Digital Gate Locks, Door & Gate Lock Bundles, Promotions.