Fingerprint Door Knob Smart Lock - App Control and Keyless Security

Our review of this fingerprint door knob finds it best suited to homeowners who want a straightforward, keyless way to secure bedrooms, apartments, or interior entryways. The single biggest reason to buy is the combination of three unlocking modes and local biometric storage, which gives simple, private access without sending data to the cloud. Installation is basic and the rechargeable battery and USB charging add convenience, so this model performs well where moderate security and ease of use are priorities.

Key Features

• 3 Modes: Passage, entrance and privacy modes are easy to switch by rotating the thumbprint sensor, so you can change access behavior quickly for different rooms.
• Biometric Storage: The lock stores up to 50 fingerprints locally, allowing multiple household members reliable, fast access without online syncing.
• App Control: Bluetooth app management lets the owner add fingerprints, view unlocking records and toggle privacy mode when they are in Bluetooth range for convenient local control.
• Backup Key: Traditional physical keys are included so the lock still operates if battery power is depleted or remote access is not available.
• Rechargeable Battery: A built-in 400mAh battery charges in 3 to 4 hours via USB A to Type-C and includes a low-battery alarm to avoid unexpected downtime.
• Auto Lock: A 5s auto-locking feature helps ensure the door secures itself after entry, reducing the chance of accidentally leaving a door unlocked.

Who It's For

This lock is a good fit for renters and homeowners who need a simple, smart upgrade for interior doors or entry doors that fit US standard dimensions and who value local biometric privacy over cloud services. It is especially convenient for bedrooms or apartments where quick, keyless access and a physical key backup are both important.

Those who need remote Wi-Fi control should note the lock requires a separately purchased gateway for Wi-Fi access, and buyers seeking heavy-duty, high-end commercial hardware may prefer a more robust metal deadbolt solution.

Pros & Cons

Pros

• Easy installation with common tools and compatibility with most US doors.
• Reliable fingerprint recognition with storage for up to 50 fingerprints for household use.
• Convenient rechargeable battery with visible power display and low-battery alert.
• Combination of app control, fingerprint unlocking and traditional keys covers multiple access scenarios.

Cons

• Durability opinions vary among users, with some reporting a less solid feel compared with heavier locks.
• App control is limited to Bluetooth range unless a separate gateway is purchased for Wi-Fi access.

Specifications

Product Type	Fingerprint door knob smart lock
Fingerprint Capacity	Up to 50 fingerprints
Battery	Built-in 400mAh rechargeable battery
Charging	USB A to Type-C, 3 to 4 hours charge time
Auto Lock	5s auto-lock feature
Access Modes	Passage, entrance, privacy
App Control	Bluetooth app (Wi-Fi via separate gateway)

Our Verdict

The fingerprint door knob is a practical, value-focused choice for residential interiors and apartments that need keyless convenience with local biometric privacy. It pairs useful features like multiple access modes, a rechargeable battery and app management for Bluetooth range, making it a sensible upgrade for most homes-while those needing heavy-duty commercial hardware or built-in Wi-Fi should consider other options.

Frequently Asked Questions

Can the lock be operated without the app?
The lock supports fingerprint, thumb rotation modes and physical keys for full operation without the app; the app adds management convenience over Bluetooth.

How long does the battery take to charge and how is low power indicated?
The internal 400mAh battery charges in about 3 to 4 hours via USB A to Type-C and the unit provides a visual power display plus a low-battery alarm.

Does the lock send fingerprints to the cloud?
No, fingerprints are stored locally on the lock and are not uploaded to the cloud to protect family privacy.