energy efficiency
Kasa Smart Plug Slim with Energy Monitoring (KP115)
The easiest entry point into knowing what's actually driving your electric bill. Plug in a lamp, a space heater, whatever you're curious about, and the Kasa app shows real wattage instead of guessing. No hub needed, but 2.4GHz-only WiFi trips some people up on setup.
Kasa Matter Smart Plug with Energy Monitoring (KP125M, 2-Pack)
Same energy tracking as the single KP115, but Matter-certified, so it works natively with Apple Home too, not just Alexa and Google. The 2-pack makes more sense than buying single units if you're monitoring more than one device.
Sense Home Energy Monitor
A step up from smart plugs — this installs at your breaker panel and tracks your whole home's usage at once, not just individual devices. Requires a licensed electrician for install, which is the real cost most reviews don't emphasize enough. Worth it if you want the full picture, overkill if you're just curious about one appliance.