Fingerprint Door Lock Smart Door Knob with App Control - Keyless

In this review of the Fingerprint Door Lock smart door knob, the bottom line is simple: this is a practical, budget-friendly upgrade for interior doors where convenience and quick access matter most. The lock's strongest selling point is its 3-in-1 approach - local fingerprint unlocking, Bluetooth app control, and a traditional key backup - which makes it a flexible choice for bedrooms, apartments, and home offices where wired or cloud systems are unnecessary. It is best suited to homeowners or renters who want a straightforward, rechargeable smart knob that keeps biometric data local.

Key Features

• 3-in-1 access: Combines fingerprint, Bluetooth app control, and a physical key so you have multiple entry options for different situations.
• Three user modes: Passage, entrance, and privacy modes are easy to switch by rotating your thumb on the knob and offer quick control over access behavior.
• Local biometric storage: Stores up to 50 fingerprints on the device itself so biometric data is not uploaded to the cloud, protecting family privacy.
• Auto lock and battery indicators: 5s auto-lock and a visual power display with low-battery alarm help prevent lockouts and signal when recharging is needed.
• Rechargeable battery: Built-in 400mAh battery recharges in about 3 to 4 hours via USB A to Type-C, removing the need for disposable batteries.
• Simple installation: Designed to fit most US doors and installs with a screwdriver following the included instructions.

Who It's For

This smart knob is best for renters, families, and apartment dwellers who want keyless convenience on interior or main entry doors without a complex setup. It works well where Bluetooth-range app control is sufficient and where owners appreciate local fingerprint storage rather than cloud syncing.

Those who need full remote Wi-Fi control, an integrated smart-home hub, or industrial-grade commercial security should look elsewhere, since Wi-Fi requires an additional gateway and the product is intended for typical residential door use rather than heavy-duty commercial applications.

Pros & Cons

Pros

• Multiple access methods provide flexibility and a reliable key backup.
• Easy to install with common tools and clear instructions, making DIY fitting straightforward.
• Local fingerprint storage and a visible power display protect privacy and reduce surprise downtime.
• Rechargeable battery eliminates repeated AA replacements and charges in a few hours.

Cons

• App control works only within Bluetooth range and Wi-Fi requires buying a separate gateway.
• Some users report mixed lock functionality, so fit and operation should be checked on delivery.

Specifications

Product type	Fingerprint door knob (smart lock)
Access methods	Fingerprint, Bluetooth app, physical key
Fingerprint capacity	Up to 50 fingerprints
Battery	Built-in 400mAh rechargeable (USB A to Type-C)
Auto lock	5 second auto locking
Modes	Passage, entrance, privacy
Compatibility	Fits most US doors; Wi-Fi requires separate gateway

Our Verdict

The Fingerprint Door Lock smart door knob is a sensible, value-oriented choice for bedrooms, apartments, and home interiors that need quick, keyless access with a fallback key. With local fingerprint storage, easy installation, and a rechargeable battery, it offers practical features for everyday residential use - just be aware that app control is limited to Bluetooth range and some users report inconsistent lock performance.

Frequently Asked Questions

Can I control the lock from anywhere?
Not by default; app control works within Bluetooth range and Wi-Fi access requires purchasing a separate gateway.

How many fingerprints can be stored?
The device stores up to 50 fingerprints locally on the unit.

How long does the battery take to charge?
The built-in 400mAh battery typically recharges in about 3 to 4 hours using the included USB cable.