Christopher NullFreelance Contributor, TechHive

Christopher Null is a veteran technology and business journalist. He contributes regularly to TechHive, PCWorld, and Wired, and operates the websites Drinkhacker and Film Racket. Disclosure: He also writes for Hewlett-Packad's marketing website TechBeacon.

smart lock hub 2019

The best smart lock for a keyless home

Keys are yesterday’s tech, your smart home needs a smart door lock.

ultraloq u bolt pro wifi

Ultraloq U-Bolt Pro WiFi review: A smart lock with a healthy facelift

But its biggest upgrade—integrated Wi-Fi—remains half-baked.

air purifier roundup

The best air purifiers: Keep your home safe, comfortable, and odor-free

The world of air purifiers can be confusing, but the bottom line is that the best units can improve your quality of life.

zigma air purifier

Zigma Smart Aerio 300 air purifier review: Capable enough for smaller spaces

The addition of an ultraviolet germ-killing bulb makes for a useful upgrade.

securam eos installed

Securam EOS review: A smart lock with a fingerprint reader, Wi-Fi, Bluetooth—and connectivity issues

It’s a strong second effort, but Securam continues to work through growing pains.

filtrete smart air purifier sc02 clop white

Filtrete Smart Room Air Purifier (model FAP-SC02) review: Proof that name brands don’t mean everything

A buggy app experience is matched by a surprisingly loud fan.

kasasmart kp401

TP-Link Kasa Smart Outdoor Plug (model KP401) review: This mono-plug outlet isn’t a good value

TP-Link, not to mention the competition, offers better options.

smartplug hub

Best smart plugs: These gadgets will turn any electrical outlet into a smart socket

With models from Lutron, Wemo, Leviton, iDevices, and others, it can be difficult to know which easy and inexpensive device is best for controlling the lamps and small appliances in your smart home. We’ll help you find the right one.

dustmagnet 5440i in a bedroom

Blueair DustMagnet 5440i review: This powerful purifier can double as an end table

Unique airflow design—and dependable performance—set this purifier apart.

kasa smart kp405png

TP-Link Kasa Smart Wi-Fi Outdoor Dimmer Plug (model KP405) review: Just one outlet, but it can dim

This straightforward smart plug is worth a look if you absolutely need dimming features.

x sense video doorbell vd2.

X-Sense Smart Video Doorbell VD2 review: Mundane looks, solid operation

This video doorbell doesn’t add anything to the category, but X-Sense users might find it a compelling option.

LiftMaster 87504-267

LiftMaster SecureView Ultra-Quiet Smart Garage Door Opener review: Practical luxury

Proving there’s no such thing as overkill when it comes to smart garage door features.

sunsa wand installed

Sunsa Wand review: Convert your existing window blinds into smart blinds

This gadget can automate your window blinds for a fraction of what a new smart blind costs.

square d x series family

Square D X Series Wi-Fi Dimmer Switch review: Contractor quality, contractor price

The innovations in this new family of smart lighting products don’t come cheap.

combined led smart bulb hub

Best smart bulbs for your connected home

Today’s smart bulbs are brighter and easier to control than ever, but choosing the right one for your environment remains a challenge.