Quick answer: if you want to meter more than one outlet, get the Kasa KP125M 2-Pack; for a single plug with no hub at all, the Kasa Smart Plug Mini (KP115) is the simplest path to real wattage data; if you live in an Apple Home, Eve Energy (Matter) is the pick built around your ecosystem instead of bolted onto it.
Bottom Line
Kasa KP125M (2-Pack)
Matter over WiFi talks straight to your router, so there's no separate hub to buy, and the 2-pack format means you can meter a fridge and a space heater for roughly what a single premium plug costs elsewhere.
See Kasa KP125M →Kasa Smart Plug Mini (KP115)
No Matter, no Thread, no extra hardware. Just WiFi, the Kasa app, and daily and monthly wattage history that's good enough to spot the one appliance driving your bill up.
See Kasa KP115 →Eve Energy (Matter)
Built for the Apple ecosystem from day one, with local Thread control and no Eve account or cloud dependency. Needs a Thread border router you may already own.
See Eve Energy →That's the short version. Which one is actually right for you depends on how many outlets you're trying to meter and which smart home app you already live in. Here's the full breakdown.
Energy-Monitoring Plugs Compared
All three plugs report live wattage, but they differ on protocol, hub requirements, and how many outlets you're actually buying per listing.
| Feature | Kasa KP125M (2-pk) | Kasa KP115 | Eve Energy (Matter) |
|---|---|---|---|
| Price | $ | $ | $ |
| Outlets in the box | 2 | 1 | 1 |
| Protocol | Matter over WiFi | WiFi (Kasa app only, no Matter) | Matter over Thread |
| Hub / border router required | No | No | Yes (Thread border router, e.g. Apple TV 4K, HomePod mini, or SmartThings Hub v3) |
| Apple HomeKit | Yes (via Matter) | No | Yes (native) |
| Alexa | Yes | Yes | Yes |
| Google Home | Yes | Yes | Yes |
| Real-time wattage | Yes | Yes | Yes |
| Historical usage graphs | Yes (app) | Yes (app) | Yes (app) |
| Cloud account required | Yes (TP-Link account) | Yes (TP-Link account) | No (local Matter/Thread control) |
| Max load | 15A / 1800W | 15A / 1800W | 15A / 1800W |
| Link | View | View | View |
Price tiers are approximate. $ = under $50, $$ = $50 to 150, $$$ = $150 to 300, $$$$ = over $300. Tap any link for the current Amazon price.
The pattern: Kasa's two plugs cost less and skip the extra hardware, but they route through a TP-Link cloud account. Eve Energy costs about the same per outlet, runs locally over Thread once it's paired, and fits Apple households best, provided you already own a Thread border router.
WiFi, Matter-over-WiFi, or Matter-over-Thread: Does It Matter?
For basic energy tracking, the protocol matters less than the ecosystem you're already in. But it changes two things worth knowing before you buy: setup complexity and what happens when your internet goes down.
The Kasa KP115 is a plain WiFi device with no Matter support at all. It talks to the Kasa app over your home network and to Alexa or Google Assistant through their cloud skills. That's the simplest possible setup: plug it in, open the app, connect to WiFi, done. The tradeoff is that it can't join Apple Home, and every command routes through TP-Link's servers, so a dead internet connection means the app (and any voice commands) stop working, though the plug itself keeps switching on any schedule already saved to it.
The Kasa KP125M upgrades to Matter over WiFi, which is the easiest way to add Matter to a home: no separate hub, no Thread border router, and it shows up natively in Apple Home, Alexa, and Google Home simultaneously instead of needing separate skills for each. Matter-over-WiFi devices still depend on your router being up, but they add cross-platform compatibility that plain-WiFi Kasa plugs don't have.
Eve Energy (Matter) goes a step further with Matter over Thread, a low-power mesh protocol that keeps working locally between Thread devices even if your internet connection drops, and that responds faster than WiFi-only smart home commands typically do. The catch is that Thread needs a border router already present in your home. If you own an Apple TV 4K, a HomePod, a HomePod mini, or a newer SmartThings hub, you already have one and Eve Energy joins your existing Thread mesh at setup. If you don't own any of those, you're either buying one or the Thread advantage doesn't apply to you.
Building a broader Apple-first setup? Our guide to Apple HomeKit devices covers which hubs double as Thread border routers, which matters directly for whether Eve Energy is a plug-and-play purchase or a two-device purchase.
How Owners Rate These in Practice
Energy-monitoring plugs live or die on whether the numbers in the app actually match reality, and on how much friction the setup adds. Here's the paraphrased pattern from owner feedback on each pick.
Kasa KP125M
Owners describe the Matter pairing process as noticeably faster than the older Kasa-app-only plugs, often joining Apple Home in under a minute once the home already has a Matter-compatible hub. The energy graphs are the most-praised feature, with owners specifically calling out catching a space heater or old chest freezer as the source of an unexpectedly high bill. The recurring complaint is that the compact 2-pack size can block an adjacent outlet on some wall plates, so owners with tightly spaced duplex outlets should check plate spacing first.
Kasa Smart Plug Mini (KP115)
This is one of the longer-standing energy-monitoring plugs on the market, and owner feedback reflects that maturity: setup is described as consistently reliable, and the historical-usage view is called out as genuinely useful for tracking down phantom-load devices like an unused game console or a router left on an old power strip. The most common gripe is that the plug requires a TP-Link account and cloud connectivity for full functionality, which some privacy-conscious owners note as a downside compared to newer local-control options.
Eve Energy (Matter)
Apple Home owners consistently highlight how well Eve Energy fits into existing Home app automations, and the lack of a required Eve account is repeatedly cited as a meaningful privacy advantage over WiFi-cloud competitors. The most common friction point in owner reports is confusion during first setup about whether a Thread border router is present and reachable, since the plug won't pair reliably without one; owners who already ran Apple TV 4K or HomePod mini units report a smooth pairing experience once that requirement is met.
Jacob’s read on this category
The number that actually changes behavior isn't the live wattage reading, it's the weekly or monthly graph. A live number is a curiosity you check once; a graph is what makes you notice the freezer in the garage is running twice as long as it should. Buy for the graph, not the flex-your-app-widget moment, and don't overspend on Thread if you don't already own a border router: Matter-over-WiFi gets you 90 percent of the cross-platform benefit with zero extra hardware.
Which Should You Buy?
Match the plug to your outlet count and your ecosystem, not to whichever one has the flashiest spec sheet.
If energy monitoring is just one piece of a bigger plan to automate your home, our smart home starter guide walks through how plugs, hubs, and sensors fit together, and our general smart plug roundup covers picks for people who care more about app polish or outdoor use than watt-level tracking.
Frequently Asked Questions
Behind This Comparison
We pulled current listings and manufacturer spec pages for each plug, cross-checked protocol claims (WiFi vs Matter vs Thread) against the brand's own product pages rather than relying on marketing copy alone, and confirmed hub or border-router requirements before writing them into the table. Pricing and availability were verified against the live Amazon listings on 2026-08-11.
We do not take payment from TP-Link, Eve, or any brand mentioned here. If you spot an error, please let us know.