Smart appliances are household devices that connect to the internet and can be monitored, controlled, or automated remotely. Unlike traditional appliances that simply turn on and off, smart appliances contain sensors, processors, and wireless radios that let them communicate with your phone, voice assistants, and each other. Nearly half of American homes now have at least one smart device, and the category has expanded well beyond thermostats to include refrigerators, ovens, washers, robotic vacuums, and more.
What Makes an Appliance “Smart”
At its core, a smart appliance has three capabilities that a traditional one lacks: sensing, acting, and communicating. A smart washing machine, for example, can detect the size of a load and adjust water levels (sensing), change its cycle settings automatically (acting), and send your phone a notification when the laundry is done (communicating). These three functions work together through embedded microcontrollers and a wireless connection to your home network.
The “smart” label gets applied loosely, so it helps to know the spectrum. On the simpler end, a smart plug turns any lamp or fan into something you can control from your phone. On the more complex end, a smart refrigerator might track expiration dates, suggest recipes based on what’s inside, and adjust its compressor speed to save energy. The common thread is internet connectivity and some degree of automation or remote control.
How You Control Them
Most smart appliances are controlled through a companion smartphone app provided by the manufacturer. GE uses its SmartHQ app, Samsung uses SmartThings, LG uses ThinQ, and so on. These apps let you start or stop cycles, adjust settings, monitor energy use, and receive alerts from anywhere with a cell signal.
Voice control adds another layer. Once your appliance is connected to Wi-Fi and linked to a voice assistant like Amazon Alexa, Google Home, or Apple’s Siri, you can issue spoken commands. Preheating an oven to 350 degrees, starting a robot vacuum, or dimming the lights becomes a hands-free task. The voice assistant acts as a bridge between your spoken words and the appliance’s wireless controls.
Some households also use wall-mounted smart displays or centralized hubs that pull all their devices into one interface. This is where the concept of a “smart home” takes shape: not just individual connected appliances, but a coordinated system where the thermostat, lights, locks, and kitchen appliances can respond to schedules, routines, or triggers you set up.
Common Types of Smart Appliances
- Smart thermostats learn your schedule and adjust heating and cooling automatically. They can also respond to energy grid signals, lowering the temperature by a few degrees during peak demand periods to reduce your bill.
- Smart refrigerators feature interior cameras, touchscreen displays, and inventory tracking. Some models let you see what’s inside from the grocery store aisle.
- Smart washers and dryers send notifications when cycles finish, allow remote start, and can recommend optimal settings based on load size.
- Smart ovens and ranges support remote preheating, temperature monitoring, and sometimes built-in cooking guides.
- Robot vacuums map your floor plan, avoid obstacles, and can be scheduled or triggered by voice commands.
- Smart lighting allows dimming, color changes, scheduling, and integration with motion sensors or other devices.
- Smart locks and doorbells provide keyless entry, visitor alerts, and remote access for guests or deliveries.
How They Connect to Your Network
Smart appliances use several wireless protocols to communicate, and understanding the basics helps when you’re shopping. Wi-Fi is the most common for large appliances like refrigerators and ovens because it connects directly to your router without extra hardware. The downside is that Wi-Fi devices consume more power, which matters less for plugged-in appliances but more for battery-powered sensors.
Zigbee and Thread are low-power wireless protocols designed for smaller devices like sensors, smart bulbs, and switches. Zigbee has been around for years and operates on the 2.4 GHz band, the same frequency as most Wi-Fi networks. Thread is newer and uses IPv6, giving devices native internet connectivity. Both create mesh networks, meaning each device strengthens the signal by relaying data to its neighbors.
The biggest development in recent years is Matter, an industry standard backed by Apple, Google, Amazon, and Samsung. Matter’s goal is to let devices from different manufacturers work together seamlessly across any ecosystem. As of late 2024, Matter supports over 40 device types, though some categories like security cameras are still missing. The reality is mixed: not every manufacturer has added Matter support, and not every platform supports every Matter device type. A smart air purifier might work with Alexa through Matter but not with Google Home. The standard is improving, but it hasn’t yet delivered on its full promise of universal compatibility.
Energy Savings: What the Data Shows
Energy efficiency is one of the most common selling points for smart appliances, but the actual savings depend heavily on the product category. Smart thermostats deliver the most consistent returns because they actively optimize heating and cooling, which accounts for roughly half of a typical home’s energy use. Lowering the temperature by even a couple of degrees during hours you’re away adds up over a full year.
For other appliances, the picture is less clear. An econometric study examining Energy Star appliances found that certified refrigerators reduced annual electricity usage by about 3% on average. However, the same study failed to find significant electricity reductions from Energy Star clothes washers, dishwashers, televisions, or computers. That doesn’t mean smart features are useless for those categories, but it does suggest that the savings come more from how you use the appliance than from the “smart” label itself. Features like cycle scheduling during off-peak electricity hours or notifications that prevent you from running half-empty loads can help, but they require you to actually use them consistently.
Privacy and Security Trade-Offs
Connecting appliances to the internet means they collect data, and the volume can be surprising. A smart thermostat knows when you’re home and when you’re not. A smart speaker processes voice recordings. A smart TV tracks viewing habits. A smart doorbell captures video of everyone who approaches your front door. This data collection enables the convenience these products offer, but it also creates real privacy considerations.
Published research identifies several categories of risk. The most common concern in the literature is privacy intrusion: the unwanted release or misuse of personal information collected by devices in your home. Beyond that, smart appliances face threats from hacking, malware, denial-of-service attacks, and unauthorized access to system controls. A compromised smart lock or security camera poses obvious problems that a hacked traditional deadbolt never could.
You can reduce your exposure with a few practical steps. Keep device firmware updated, since manufacturers patch known vulnerabilities through software updates. Use strong, unique passwords for each device and its associated app. Consider placing smart home devices on a separate Wi-Fi network from your computers and phones, which limits what an attacker can access if one device is compromised. And before buying, check the manufacturer’s privacy policy to understand what data is collected and whether it’s shared with third parties.
What to Consider Before Buying
The most important question isn’t whether an appliance is smart, but whether the smart features solve a real problem for you. A smart oven that you can preheat from your phone sounds appealing, but if you’re always in the kitchen when you cook, you’re paying extra for a feature you won’t use. On the other hand, a smart thermostat in a home with unpredictable schedules can pay for itself within a year or two through energy savings alone.
Ecosystem compatibility matters more than most people realize at the point of purchase. If your household already uses Google Home, a device that only integrates with Alexa will create friction. Check which voice assistants and platforms a device supports before committing. Matter is slowly improving cross-platform compatibility, but as of now, it’s not reliable enough to assume everything will just work together.
Longevity is another factor. Traditional appliances work until they physically break. Smart appliances depend on software, cloud servers, and manufacturer support. If a company discontinues its app or shuts down its cloud service, the smart features can stop working even while the appliance itself is mechanically fine. Buying from established manufacturers with a track record of long-term software support reduces this risk, though it never eliminates it entirely.