Device reviews
Ten device categories compared on the criteria that actually decide a purchase — local control, subscription cost, power source, and protocol. See Devices for the full catalogue of 217 device types.
Ten device categories compared on the criteria that actually decide a purchase — local control, subscription cost, power source, and protocol. See Devices for the full catalogue of 217 device types.
Smart lock subscriptions became common from 2023 onward, with remote unlock, guest codes, and sometimes even auto-lock moved behind $5–$10/month tiers. All six below include every feature at purchase. Scores are Smart Home Perfected's.
| Lock | Score | Award | Notes |
|---|---|---|---|
| eufy FamiLock S3 Max | 9.5 | Best overall | Palm-vein, fingerprint, keypad, app, and physical key. 8-10 months on AAs. No fees ever. |
| Ultraloq U-Bolt Pro Wi-Fi | 9.3 | Best 8-in-1 | Eight unlock methods, anti-peep keypad, door sensor included, Wi-Fi built in (no hub). |
| Yale Assure Lock 2 with Wi-Fi | 9.1 | Best mainstream brand | Yale-grade deadbolt body, built-in Wi-Fi, Apple Home/Google/Alexa at no cost. |
| Lockly Visage Zeno | 9.0 | Best face recognition | On-device biometrics (never uploaded), sub-0.5s recognition, under $300. |
| Level Bolt (Wi-Fi) | 8.9 | Best invisible | Hides entirely inside your existing deadbolt; outside hardware and keys unchanged. |
| Philips Wi-Fi Smart Door Lock | 8.6 | Best budget | Under $200, built-in Wi-Fi, free guest codes with expiry dates. |
Source: Best No-Subscription Smart Locks 2026 — Smart Home Perfected. The five-year cost argument is the useful takeaway: a $300 no-subscription lock costs $300 over five years, while a $200 lock at $8/month costs $680 — roughly 2.3× the price for a subset of the features. See our temporary guest lock codes automation for time-limited access on any lock.
The deciding factor is storage. Local storage avoids a recurring fee; cloud-only models usually paywall video history.
| Consideration | What to look for | Why it matters |
|---|---|---|
| Storage | microSD or NVR/local recording | Removes the monthly fee entirely and keeps footage on your property. |
| Power | Wired to existing chime transformer | Battery models miss events while recharging and degrade in cold weather. |
| Field of view | Tall (1:1 or 3:4) aspect ratio | Shows packages on the doorstep, not just a visitor's face. |
| Detection | On-device person/package detection | Cuts false alerts without sending video to a cloud analyser. |
| Hub integration | Exposes a doorbell-press event | Needed for automations like pausing the TV or flashing a lamp. |
Notable no-subscription options include eufy's wired doorbell range and Reolink's PoE models. We haven't published our own testing for this category yet — Smart Home Perfected maintains a local-storage doorbell roundup.
A camera's privacy posture is independent of your hub's. Connecting a cloud camera to a local hub does not make the camera local.
| Consideration | What to look for | Why it matters |
|---|---|---|
| Local access | RTSP or ONVIF stream | Lets any hub or NVR record without the vendor's cloud or app. |
| Power & network | PoE (Power over Ethernet) | One cable for power and data, no Wi-Fi congestion, no battery swaps. |
| Subscription | Full features with no plan | Several major brands gate person detection and history behind a fee. |
| Offline behaviour | Records to local storage when WAN is down | An outage shouldn't create a gap in your footage. |
| Measured traffic | Few outbound endpoints | Reolink Duo 3 PoE reached only 3 servers in independent testing, versus 78-94 for the smart TVs on the same bench. |
Source for the traffic figures: Privacy Verified test results — Smart Home Perfected.
Usually the highest-return smart home purchase, because heating and cooling is most homes' largest energy cost. ENERGY STAR estimates $50–$145/year in savings versus a non-programmable thermostat.
| Consideration | What to look for | Why it matters |
|---|---|---|
| Room sensors | Support for remote sensors | Schedules against the temperature where people are, not the hallway. |
| Wiring | C-wire, or a power-extender kit included | The most common installation blocker in older homes. |
| System type | Heat pump / multi-stage / OpenTherm support | Compatibility varies sharply; check before buying, not after. |
| Subscription | Core scheduling free | Basic smart scheduling should never sit behind a paywall. |
| Local control | Works from the hub without vendor cloud | Keeps heating running during an internet outage. |
ecobee Premium and the Google Nest range are the most commonly recommended; in Europe, radiator valves (TRVs) often deliver more per euro than a single thermostat because they add per-room control. See our multi-zone occupancy automation.
| Consideration | What to look for | Why it matters |
|---|---|---|
| Local control | Local API or Matter support | Several popular models route even a start command through the vendor cloud. |
| Dock | Self-emptying, and self-washing for mops | The difference between weekly and monthly maintenance. |
| Mapping | Persistent multi-floor maps with zones | Enables "clean the kitchen" as an automation target. |
| Obstacle handling | On-device object recognition | Cable and pet-mess avoidance is the main real-world failure point. |
| Measured traffic | Encrypted, no ad servers | Lefant M210P cleared on encryption with zero ad servers, but required a mandatory account and had an undocumented Bluetooth control channel. |
Source for the traffic findings: Privacy Verified — Smart Home Perfected.
Among the best value in the entire category: a handful of sensors costs less than one insurance excess.
| Consideration | What to look for | Why it matters |
|---|---|---|
| Protocol | Zigbee, Z-Wave, or Thread | Battery life measured in years rather than weeks. |
| Local alerting | Hub-side siren, not just a push notification | A phone alert is useless if the phone is on silent. |
| Valve type | Motorised ball valve on the main | Turns detection into an actual fix while nobody's home. |
| Zone scoping | Separate irrigation from indoor plumbing | Stops a garden sensor cutting your drinking water. |
| Probe design | Detachable cable probe | Reaches into drip trays and tight cabinet corners. |
See our water leak automatic shutoff automation for the implementation, including how to avoid false triggers across zones.
| Consideration | What to look for | Why it matters |
|---|---|---|
| Power monitoring | Real wattage reporting, not just on/off | Enables appliance-finished detection and standby-cutoff automations. |
| Protocol | Zigbee or Thread over Wi-Fi | Dozens of Wi-Fi plugs will strain a consumer router. |
| Rating | Check the amp rating against the load | Heaters and kettles exceed many cheap plugs' limits. |
| Whole-home metering | P1 port reader or CT clamps | P1 (common in Europe) reads the utility meter directly — more accurate than clamps. |
| State after power cut | Configurable restore behaviour | Decides whether a fridge comes back on after an outage. |
| Consideration | What to look for | Why it matters |
|---|---|---|
| CO2 sensor type | True NDIR sensor, not estimated from VOC | "eCO2" values derived from VOC readings are approximations, not measurements. |
| Particulates | PM2.5, ideally PM1 and PM10 too | PM2.5 is the fraction most associated with health effects. |
| Placement | One per bedroom / home office | CO2 rises fastest in small closed occupied rooms. |
| Hub exposure | Reports raw values, not just a rating | You need numbers to set automation thresholds. |
| Hysteresis | Configurable on/off gap | Prevents ventilation cycling rapidly around one threshold. |
Common reference points: roughly 800–1000 ppm CO2 indicates a stuffy room, 1200+ ppm warrants active ventilation. See our CO2-triggered ventilation automation.
| Consideration | What to look for | Why it matters |
|---|---|---|
| Weather skip | Rain delay from forecast or a local gauge | The single feature that pays for the controller in water savings. |
| Zones | More zones than you currently need | Lawn, beds, and pots want very different schedules. |
| Soil input | Accepts a soil moisture sensor | Water because the ground is dry, not because it's Tuesday. |
| Seasonal adjust | Percentage multiplier by month | Avoids running a July schedule in October. |
| Local fallback | Schedule stored on the device | Watering shouldn't stop because the Wi-Fi dropped. |
Rachio and Hunter Hydrawise are the most commonly cited; several Z-Wave controllers exist for hub-native setups. See our weather-adjusted irrigation automation.
Smart features are a supplement to certified life-safety hardware, never a replacement for it.
| Consideration | What to look for | Why it matters |
|---|---|---|
| Certification | Regional standard (EN 14604, UL 217) | Non-certified "smart" alarms may not satisfy building or insurance requirements. |
| Interlink | All units sound together | An alarm in the basement must be audible upstairs. |
| Sensor type | Photoelectric plus CO, or dual-sensor | Different fire types are detected by different sensing methods. |
| Battery | 10-year sealed cell | Removes the annual battery ritual most people skip. |
| Hub event | Distinct alarm vs. low-battery states | Emergency automations must not fire on a battery chirp. |
See our smoke/CO emergency lighting and unlock flow for the automation pattern, including why the trigger must be scoped to a confirmed alarm state.
Prices, model availability, and firmware behaviour change — verify current details before buying. See Devices for the full 45-category catalogue and Hub reviews for the hub side.