Smartmi Air Purifier 2.

The Gavler Review.

Smartmi Air Purifier 2 Review: Native HomeKit Air, If You Can Get It Connected

The Smartmi Air Purifier 2 sits at number nine on our Best Air Purifiers list with a 7.8 — a genuinely rare combination of native Apple HomeKit support and UV-C sterilization for well under $300. It's a good pick for a small-to-mid room where HomeKit integration matters more than anything else, but it comes with a real catch: getting it connected in the first place can be a genuine ordeal.

What it is

The Air Purifier 2 is built to be a first-class citizen in Apple's smart home ecosystem rather than a generic purifier with an app bolted on. It pairs directly into HomeKit, with Sign in with Apple support that means a separate Smartmi account isn't strictly required, and it also works with Alexa and Google Assistant for households that mix ecosystems. Beyond the smart-home layer, it adds an integrated UV-C lamp that targets bacteria and viruses on the air it's already captured — a feature most purifiers in this price range skip entirely.

The filtration itself is a four-stage cylindrical design with a True HEPA H13 layer and activated carbon, pulling air in from all 360 degrees rather than a single intake side. A top-mounted display shows a color-coded air-quality ring, a numeric PM2.5 readout, and a TVOC bar, controlled with two capacitive buttons. Coverage is rated for 279 to 484 square feet, with a pollen CADR of 208 CFM and a smoke/dust CADR of 196 CFM — solid numbers for a roughly 400-square-foot room, though not in the same class as the large-room purifiers higher on this list.

In use and performance

AppleInsider's Andrew O'Hara put the Air Purifier 2 through a full HomeKit-focused review, and the split between the device once it's running and the process of getting it there is stark. On design, he was straightforwardly positive: "It has a handsome dark, metallic blue-grey body that sits on a slightly-reflective light gold base" — a purifier that doesn't look like an appliance you need to hide in a closet.

Once actually connected, the HomeKit experience delivered on its promise. O'Hara's testing found the automations worked exactly as they should: "HomeKit automations and routines worked perfectly, making this a solid air purifying solution — at least once we got passed the awkward setup process." That qualifier is doing a lot of work, because the setup process itself was the review's central complaint. "Even after a week of running, the air quality still was not displayed within the Home app," O'Hara found — and more specifically, "the air quality wasn't listed. It merely read 'unknown' without giving us a reading," despite repeated Wi-Fi resets. Firmware updates also can't be pushed through the Home app at all, which means keeping the device current requires the separate Smartmi app.

Noise is the other real limitation. O'Hara was direct about it: "at max speed, the SmartMi 2 is quite loud." That pushes most owners toward the lower speed settings for bedroom use, which in turn caps how quickly the unit can actually clear a room when air quality spikes. You also can't adjust fan speed from the unit itself — that control lives entirely in the app or HomeKit, which is a minor inconvenience if your phone isn't handy.

Strengths

• Genuinely native HomeKit integration. Not a third-party bridge or a workaround — direct HomeKit pairing with Sign in with Apple support, and automations that AppleInsider confirmed work flawlessly once connected.
• UV-C sterilization at a rare price point. An integrated UV-C lamp targeting bacteria and viruses on captured air is a feature usually reserved for purifiers costing significantly more.
• A design that doesn't look like an appliance. AppleInsider specifically called out the dark metallic blue-grey body and reflective gold base as a genuine design strength.
• Real-time air-quality display. The top-mounted ring, numeric PM2.5 readout, and TVOC bar give at-a-glance status without opening an app.

The trade-offs — who should skip it

• Setup can be a genuine ordeal. AppleInsider's own testing hit a full week of "unknown" air-quality readings in the Home app despite repeated Wi-Fi resets — a real risk, not a rare edge case, for anyone counting on smooth HomeKit onboarding.
• Firmware updates require the Smartmi app. You can't keep the device current through Apple's Home app alone, which undercuts the "native HomeKit citizen" pitch somewhat.
• The fan gets loud at max speed. If you need maximum air-clearing speed during an allergy flare-up or wildfire smoke event, expect real noise — most owners will run it on lower settings instead.
• No on-device fan speed control. Every adjustment happens through the app or HomeKit; there's no manual override on the unit itself.

If any of these are dealbreakers — especially the setup risk — a purifier with a smoother onboarding process and a less demanding smart-home dependency may serve you better, even without HomeKit integration.

How it compares

On Gavler's Best Air Purifiers list, the Air Purifier 2 sits just below the Honeywell HPA300 at rank eight, a larger, simpler purifier built for raw CADR rather than smart-home features — a better fit if HomeKit isn't a priority and coverage area is. Right below it at rank ten, the Alen BreatheSmart 75i trades the Smartmi's smart-home focus entirely for whole-home coverage and heavy-duty carbon filtration at nearly five times the price — a different product built for a different room size and a different problem (odors and VOCs at scale, not app integration). Against both, the Smartmi's case is narrow but real: nothing else on this list combines native HomeKit, UV-C, and a sub-$300 price in one box.

The Gavler verdict

A 7.8 for a purifier that delivers on a genuinely rare combination — native HomeKit, UV-C sterilization, and a design that looks good on a countertop — once you get past the setup. AppleInsider's own 2.5-out-of-5 score reflects real friction, not nitpicking: a week of "unknown" air-quality readings and a fan that gets loud at full speed are legitimate reasons to hesitate. Buy it if HomeKit integration in a small-to-mid room is genuinely your priority and you're willing to work through a rough first week. If smooth setup matters more to you than smart-home bragging rights, there are simpler purifiers on this list worth a look first.

Common Questions

Is the Smartmi Air Purifier 2 worth it in 2026?

It's a rare thing at its price — native HomeKit integration plus UV-C sterilization for under $300 — and AppleInsider liked the design and the price once it was running. But the outlet scored it just 2.5 out of 5 over a genuinely painful setup process and a fan that gets loud at max speed. Buy it for HomeKit integration in a small-to-mid room if you're prepared for a rough first week; look elsewhere if setup friction is a dealbreaker.

Does the Smartmi Air Purifier 2 work with Apple HomeKit?

Yes, natively, with Sign in with Apple support so a third-party account isn't strictly required. AppleInsider found that once it was actually connected, HomeKit automations and routines worked perfectly — the problem is getting there, not the integration itself.

What's the biggest problem with the Smartmi Air Purifier 2?

Setup. AppleInsider's testing found the Home app displayed the purifier's air quality as 'unknown' for a full week despite repeated Wi-Fi resets, and firmware can't be updated through the Home app at all. The fan also gets notably loud at its top speed, which pushes most owners toward lower settings in a bedroom.