The Kasa Smart Plug HS103P4 is the four-pack version of TP-Link’s best-selling smart plug — a simple, reliable Wi-Fi outlet that has become a default recommendation for buyers furnishing a whole home or apartment in one purchase. Each plug works with Amazon Alexa, Google Assistant and Samsung SmartThings without a hub, fits on a standard outlet without blocking the second socket too aggressively, and ships with a polished Kasa app that handles scheduling, scenes and Away mode well. At around $35 for four it is one of the lowest per-plug prices in the category. This Kasa HS103P4 review covers setup, smart features, build, reliability and who should buy.
Prime Kasa Smart Plug HS103P4, Smart Home Wi-Fi Outlet Works with Alexa, Echo, Google Home & IFTTT, No Hub Required, Remote Control, 15 Amp, UL Certified, 4-Pack, White
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Kasa Smart Plug HS103P4 at a Glance
| Component | Specification |
|---|---|
| Wattage capacity | 15A / 1,800W at 120V per plug |
| Wireless protocol | Wi-Fi 2.4GHz (no Bluetooth, no 5GHz) |
| Voice assistant support | Alexa, Google Assistant, SmartThings (no HomeKit) |
| Scheduling | Yes, per-plug schedules and scenes in Kasa app |
| Away mode / Energy monitoring | Away mode included; no per-device energy reporting |
| Outdoor rated | No — indoor use only |
| Sockets per device | 1 socket per plug; 4 plugs in pack |
| Hub required | No — direct Wi-Fi pairing |
| Approx price | around $35 for the 4-pack |
Setup & App Experience
Kasa’s setup flow is the gold standard for the category. Download the free Kasa Smart app on iOS or Android, plug in the first HS103, and the app guides you through Wi-Fi pairing in about a minute. The plug uses 2.4GHz Wi-Fi only — like every Kasa model, and like almost every Wi-Fi smart plug on the market — which gives the plug longer range and is fine because the data flows are tiny. Once the first plug is on the network, the remaining three in the pack pair faster, and the app lets you label each one (“Living Room Lamp,” “Coffee Maker,” “Office Heater”) and assign them to rooms. The app is genuinely good — clean layout, fast response, no aggressive nags to upgrade — and it has been refined over years of TP-Link’s smart home work. Linking Kasa to Alexa or Google Home is a single skill-link step in the respective app, and from there each plug shows up under its named room for voice control.
Smart Features — Scheduling, Voice, Away Mode
The HS103 supports the full Kasa feature set. Per-plug schedules let you turn lamps on at sunset and off at bedtime, with sunrise and sunset calculated for your location. Scenes group plugs together — a “Movie Night” scene that dims the lamps and turns on the gaming PC, for example, runs from a single tap or voice command. Away mode randomises lamp on/off patterns over a defined window to mimic occupancy, which is a credible deterrent on holidays and trips. Voice control works with Alexa (“Alexa, turn on coffee maker”), Google Assistant (“Hey Google, turn off office heater”) and Samsung SmartThings routines. There is no Apple HomeKit support — that is the one platform Kasa basics do not cover — and households built around Apple Home should look at HomeKit-native plugs instead. Multi-plug households benefit from Kasa’s grouping: turning off all four plugs at once with a single command is genuinely useful at bedtime.
Energy Monitoring & Savings
The HS103 does not include energy monitoring — that feature lives on Kasa’s KP125M and KP115 models — so the savings from this plug come from scheduling and away-mode automation rather than per-device wattage tracking. For most buyers that is the right trade-off at this price: scheduling a 1,500W space heater off during the workday or shutting down a 200W gaming-monitor and speaker setup at bedtime delivers real savings without needing precise wattage data. The 15A / 1,800W rating per plug is the standard North American maximum and is shared across the entire Kasa Smart Plug line. Each plug in the four-pack is independent and operates from its own Wi-Fi connection, so the load on one does not affect the others.
Build & Reliability
Each HS103 is a compact white plug with a single status LED and a small physical button on the side for manual on/off — useful when phones are out of reach. The chassis is wider than the slimmest Kasa Ultra Mini line, so on a standard duplex outlet the plug covers the second socket; if you need to use both sockets, the Ultra Mini HS103P4 successor or the KP125 Mini are the slimmer alternatives. Build quality is exactly what years of TP-Link’s networking heritage would suggest — solid, well-made, and reliable across years of use. Wi-Fi reconnection after router reboots is dependable, and firmware updates flow through the Kasa app without drama. TP-Link’s track record on long-term cloud support is strong, which matters for any device that depends on a remote service for voice control.
Who It’s For
The HS103P4 is the obvious choice for buyers furnishing a whole home with smart plugs in one purchase. Four plugs at around $9 each is excellent value, the dual Alexa and Google support covers the two largest ecosystems, and the Kasa app is the best-of-class for grouping and scheduling. It is not the right pick for Apple Home users — there is no HomeKit support on this model. It is also not the right pick if you need the slimmest possible profile on duplex outlets — for that the Kasa Ultra Mini 4-pack is the upgrade. For most North American households building out their first smart-plug deployment, this is the default recommendation. Combine with a NAS in our best NAS home servers for scheduled overnight backup power cycles.
Verdict
At around $35 for the four-pack the Kasa HS103P4 earns a strong recommendation as the default smart-plug for Alexa and Google Home households doing a whole-home rollout. The setup is polished, the app is genuinely good, dual-platform voice support covers most households, and TP-Link’s track record on long-term firmware support is the best in the category — which matters more than buyers often realise for a device that depends on a cloud service for voice control. The only meaningful omission is Apple HomeKit, which is a hard cap for Apple-first buyers; Apple Home households should look at the KP125M Mini Energy Monitoring plug instead. For everyone else, this four-pack is the easy answer to “which smart plug should I buy?” — and at this price the cost barrier to going whole-home smart is genuinely low. Four plugs at around $9 each is excellent value, and the Kasa app’s grouping features make it easy to control all four together at bedtime or when leaving the house. See also our best gaming laptops under $1,200 for matching budget-friendly gaming hardware and our USB-C hub buyer’s guide for desk-side accessories.
Frequently Asked Questions
Does the Kasa HS103 work with Apple HomeKit?
No. The basic Kasa HS103 line supports Amazon Alexa, Google Assistant and Samsung SmartThings, but not Apple HomeKit. For HomeKit compatibility, look at the Kasa KP125M Mini Energy Monitoring plug or other HomeKit-native plugs.
How many Kasa smart plugs can be on one Wi-Fi network?
Practical limits are set by your router rather than by Kasa. Most home routers comfortably handle 30-50 smart plugs, and TP-Link routers paired with Kasa plugs are tested to higher counts. Each plug uses minimal bandwidth.
Does the Kasa HS103P4 need a hub?
No. Each plug connects directly to your 2.4GHz Wi-Fi network through the free Kasa Smart app. No bridge, hub or extra hardware is required.
Does the Kasa HS103P4 report energy usage?
No. The HS103 line does not include energy monitoring. For per-device wattage and kilowatt-hour tracking, choose the Kasa KP125M Mini Energy Monitoring plug instead.
More Smart Plug Reviews
- Kasa Smart Plug HS103P2 Review: 2-Pack Alexa & Google Plugs
- Kasa Ultra Mini Smart Plug 15A Review: 4-Pack Slim Plugs
- Kasa Mini Smart Plug 15A Review: 4-Pack Compact Wi-Fi Plugs
- Kasa Ultra Mini Smart Plug 15A Single Review: 1-Pack Slim Plug
- Kasa Smart Wi-Fi Plug HS105 Review: Slim 12A Wi-Fi Plug
- Kasa Outdoor Smart Plug KP400 Review: 2-Socket Weatherproof Plug
- Mifaso Outlet Extender Review: 6-Outlet Surge Protector + USB
- Kasa Smart Plug Mini Energy Monitoring Review (KP125M)
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