Smart door locks are becoming increasingly common. Residents in private estates, Home Ownership Scheme (HOS) flats, and even some public housing estates are starting to switch to smart door locks to replace traditional ones. On one hand, this solves the issue of being locked out due to "forgetfulness." If a friend or relative visits suddenly while you are not home, you can also authorize them with a temporary password to enter,
On the other hand, the features of smart locks are becoming more diverse and advanced. Single-use passwords, Wi-Fi or Bluetooth mobile app control, and more have become the attractive highlights of smart locks. This time, the LINKO team has selected several smart door lock models under $5,000 on the market, including the Schneider Electric S51 Smart Door Lock, Aqara A100 Smart Door Lock, Lockly Secure Lux Smart Door Lock (Latch), Philips EasyKey 702E Smart Door Lock, and Hyundai 6-WAY Smart Door Lock. We have listed their features so that you can see everything in one article and choose the lock that suits you best.
Feature Comparison:(*Information is sourced from official or other websites and may change due to updates)
Smart door locks offer a wide variety of functions. Common unlocking methods include: fingerprint, password (permanent or temporary), and smart key card. Some newer models can be unlocked via mobile apps. More unlocking methods generally mean more convenience, but the price will also be higher, and there may be higher security risks involved. Below is a comparison of the unlocking functions for each model:
|
|
Fingerprint / Permanent Password |
Temporary Password |
RFID/NFC Key Card |
Mechanical Key |
Mobile App / Bluetooth |
|
Schneider Electric S51 Smart Door Lock |
Yes |
Yes (Self-set, up to 8 groups) |
Yes (includes 2 cards) | Yes | No |
|
Aqara (Global Version) A100 Smart Door Lock |
Yes |
Yes (App set) |
Yes | Yes |
Yes (supports HomeKit) |
|
Lockly Secure Lux Smart Door Lock (Latch) |
Yes |
Yes (Can be sent via message) |
Yes | Yes |
Yes (Bluetooth) |
|
PHILIPS EasyKey 702E Smart Door Lock |
Yes |
Yes (App set) |
Yes | No | Yes (built-in Wi-Fi module) |
|
Hyundai 6-WAY Smart Door Lock |
Yes |
Yes (App set) |
Yes (Supports Octopus card access) |
Yes | Yes (Bluetooth) |

Specification Comparison:(*Information is sourced from official or other websites and may change due to updates)
Different door locks have different specifications, such as size, suitable door thickness, and whether additional parts are needed. These should be determined in advance by an installer. Therefore, before installing a smart lock, especially on an old door (i.e., one that already has another lock installed), it is best to measure the size according to the image below and send photos to the installer for preview. The installer will then determine based on the data whether it is suitable for installation, if a basic installation is sufficient, and whether additional accessories are required. Below is a comparison of the basic specifications for each lock:
|
|
Price: (includes basic installation) |
Brand Origin (Manufacturing Origin): |
Color: |
Security Features: |
Suitable for: |
|
Schneider Electric S51 Smart Door Lock |
$3,050 (includes basic installation) |
France (China) |
Gold, Black |
One-touch locking, dual authentication with fingerprint and password |
Low budget, fewer functional requirements |
|
Aqara (Global Version) A100 Smart Door Lock |
$3,780 (includes basic installation) |
China (China) |
Black |
Alarm for prolonged door opening, can be used with Aqara camera |
Low budget, lower privacy considerations
|
|
Lockly Secure Lux Smart Door Lock (Latch) |
$5,100 (Installation requires separate quotation) |
USA (China) |
Black, Grey, Antique Bronze |
Anti-peeping electronic keypad, 3D FPC live fingerprint sensing technology, Bluetooth application |
High budget, focuses on privacy and security
|
|
PHILIPS EasyKey 702E Smart Door Lock |
$4,480 (includes basic installation) |
Netherlands (China) |
Black, Red Copper |
Low battery, anti-tamper, intrusion/bolt abnormal alarm, anti-peep hole opening, dummy password, arming function, dual verification function |
Values brand reputation, residences with metal gates
|
|
Hyundai 6-WAY Smart Door Lock |
$3,580 (includes basic installation) |
South Korea (South Korea) |
Silver-Black |
Uses dummy password technology, random number combinations can be entered, as long as the real password is included in the sequence, the lock will open |
Requires product origin, seeks convenience and ease of use |

Detailed Introduction:
Schneider Electric S51 Smart Door Lock
French brand, entry-level quality assurance

As a famous electronics brand, France's Schneider Electric has always been a guarantee of confidence, so the smart door locks they produce are also highly popular. The S51 smart door lock, launched in 2020, is the first smart door lock produced by Schneider Electric. It has fewer unlocking methods than other new models, with four-in-one unlocking: fingerprint, password, proximity card, and mechanical key. You could say it has all the functions a basic smart door lock needs, and the price is also one of the more affordable options. One factor to consider when purchasing a smart door lock is installation and after-sales service. Schneider Electric is more trustworthy in this regard than other brands; the quality of installation and after-sales follow-up are relatively excellent.
Aqara Smart Door Lock A100 Zigbee Bluetooth Smart Door Lock
Packed with the most features, supports HomeKit

Aqara (Global Version) is one of the rare electronic door locks that can be used with HomeKit. Most of its products can be connected to HomeKit, thus greatly increasing its expandability and convenience. First, let's talk about its unlocking functions: it has the most and most complete set among smart locks at similar price points, including fingerprint, password, NFC key card, and mechanical key. Additionally, it can be controlled using the Aqara App and Apple HomeKit App, meaning you can use Apple products (such as iPhone or iWatch) to unlock via sensing. Official data shows a total of 9 unlocking methods, which is definitely the lock with the most unlocking methods at this price point. If the user has a certain grasp of smart homes or Aqara products themselves, they can even pair this lock to create different smart home scenes, for example: turn on the living room lights, close the curtains, etc., upon unlocking.
Lockly Secure Lux Smart Electronic Door Lock | Latch
American brand, highest security

LOCKLY Secure Lux is the most advanced smart door lock under the LOCKLY brand. According to official data, it features a PIN Genie® keypad, as well as a fingerprint sensor, Bluetooth, RFID tap card, and mechanical key, totaling five unlocking methods. It can be considered the lock with the most security-focused designs, including: anti-peeping electronic keypad, where each number automatically changes position to ensure the keypad is different every time you use it; 3D FPC live fingerprint sensing technology, with the fingerprint sensor completing scans in as fast as 0.39 seconds and unlocking within 0.5 seconds; and built-in 256-bit Bluetooth encryption, allowing you to control the lock via a mobile app without connecting to the network, avoiding cyber attacks. Additionally, if you have guests visiting and want to authorize them to open the door, you can create a magic offline code in the mobile app and send it to the visitor via email, SMS, WhatsApp, or WeChat, allowing them to unlock the door with a single-use or limited-time reusable password.
PHILIPS EasyKey 702E Electronic Lock
Brand confidence, push-pull design

As a major traditional home appliance brand, PHILIPS has a wide variety of smart door locks, among which the 702V and 702E are particularly popular. In addition to basic fingerprint, password, card, and key unlocking, it also features a built-in Wi-Fi module, allowing you to check lock records at any time via a mobile app, remotely authorize temporary passwords, and more. It also supports dual verification, allowing you to mix any two unlocking methods to increase home security. Furthermore, the lock uses a Grade C anti-theft lock cylinder, the highest level of security. It also has multiple alarm functions, including intrusion, abnormal bolt alerts, and reminders, while also supporting low battery warnings and emergency power supply interfaces. Although most of these functions are available in other similar locks, for customers who prioritize quality and safety, PHILIPS electronic locks are definitely the best choice.
Hyundai 6-WAY Smart Door Lock
Made in South Korea, supports Octopus card access

Most smart locks on the market are made in China. This Hyundai 6-WAY smart door lock, produced and manufactured in South Korea, can be considered an alternative choice, and is a very suitable option for customers who have requirements for the manufacturing origin of the lock. It has 6 unlocking methods, including: fingerprint, touchscreen password, RFID card, smart card, Bluetooth mobile app, and mechanical key. It is worth mentioning that it supports Octopus card unlocking, allowing users to unlock via sensing with a registered Octopus card, making opening the door even more convenient and simple. In terms of security, it uses dummy password technology, allowing users to input random number combinations; as long as the real password is included in the sequence, the lock will successfully identify and open.
When you purchase any door lock from the LINKO Shop Smart Door Lock section,
enter the following in your cart: sdl100, to get $100 off.
Smart Door Lock: https://linko.shop/collections/%E6%99%BA%E8%83%BD%E9%96%80%E9%8E%96
Frequently Asked Questions
What smart door lock options are there under $5,000?
This article compares five models: Schneider Electric S51 ($3,050 including basic installation), Aqara A100 Global Version ($3,780), Lockly Secure Lux, Philips EasyKey 702E, and Hyundai 6-WAY. Each has different unlocking methods and security features, which you can choose based on your budget and needs.
Which smart door lock supports Apple HomeKit?
Among the five models in this article, the Aqara A100 (Global Version) supports HomeKit. It can be controlled using the Aqara App and Apple HomeKit App, allowing you to unlock via sensing with an iPhone or iWatch. Official data shows it has a total of 9 unlocking methods and can also be used to set up smart home scenes.
What do I need to prepare before installing a smart door lock?
Different door locks are suitable for different door thicknesses and dimensions. Before installation (especially for old doors), it is best to measure the size in advance and send photos to the installer for preview to determine if it is suitable for installation and if additional accessories are required. The LINKO Shop (linko.shop) smart door lock section offers ready stock, all are official Hong Kong licensed products.