Softwr

Weather · head to head

IQAir vs Weather Underground PWS

IQAir logo

IQAir

Weather

Global air quality information and purification

From
$399/one-time
Rated
-
Full reviewWebsite
Weather Underground PWS logo

Weather Underground PWS

Weather

World's largest personal weather station network

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Weather Underground PWS has a free tier, so it costs nothing to try first.
  • Each has a real cost: IQAir extremely expensive compared to competitors with similar particle filtration performance; Weather Underground PWS personal weather station network relies on community contributions
  • They diverge on capability: IQAir covers Global AQI data, Weather Underground PWS covers Station network.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which IQAir and Weather Underground PWS actually diverge.

Attributes where IQAir and Weather Underground PWS differ
AttributeIQAirWeather Underground PWS
Starting price$399/one-timeFree
Pricing modelUnknownfree
Free tierNoYes
PlatformsWeb, iOS, Android, HardwareWeb, Mobile
Founded19631995

Identical on both: user rating (Not yet rated), category (Weather).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in IQAir

  • Global AQI data
  • City rankings
  • Health recommendations
  • Forecasts
  • API access
  • Mobile apps
  • Smart home
  • Ios support

Only in Weather Underground PWS

  • Station network
  • Real-time upload
  • Quality control
  • Community rankings
  • PWS devices
  • Data APIs
  • Weather apps

Both cover

  • Historical data
  • Web support
  • Api support

What people use each for

The jobs each tool is most often brought in to do.

IQAir

  • Checking real-time outdoor and indoor air quality (AQI, PM2.5, etc.) via the AirVisual appnot Weather Underground PWS
  • Getting air quality forecasts for a locationnot Weather Underground PWS
  • Remotely monitoring and controlling IQAir air purifiers from a smartphonenot Weather Underground PWS
  • Integrating air quality/weather data into third-party apps via the AirVisual APInot Weather Underground PWS
  • Tracking global air pollution using monitoring station datanot Weather Underground PWS

Weather Underground PWS

  • Community-sourced weather station networknot IQAir
  • Personal weather monitoring and forecastingnot IQAir
  • Historical weather data accessnot IQAir
  • Severe weather alerts and notificationsnot IQAir

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

IQAir

  • Extremely expensive compared to competitors with similar particle filtration performance
  • Energy inefficient motors consume 215W at comparable CFM to cheaper models
  • Limited sensor specificity for users with specific allergies or respiratory concerns
  • Bulky design and outdated appearance unsuitable for modern interior design
  • Replacement filters are very expensive at $199.99 with high ongoing costs

Weather Underground PWS

  • Personal weather station network relies on community contributions
  • Data accuracy varies by station quality

Pricing, plan by plan

IQAir

$399/one-time
  • Atem Desk$399/one-time
    • Portable desktop air purifier
    • Small room coverage
  • Atem Eco$799.99/one-time
    • Smart air purification
    • Most affordable smart model
    • Released June 2026
  • Atem X$1399/one-time
    • Premium smart purifier
    • Large room coverage
    • Advanced filtration
  • HealthPro Plus$949/one-time
    • Medical-grade HyperHEPA filtration
    • Large room coverage
    • Gas and particle filtration

Weather Underground PWS

Free
  • FreeFree
    • Station registration
    • Data upload
    • Dashboard

Which should you pick?

Choose IQAir if

  • You need global aqi data.
  • You work on Web, iOS, Android, Hardware.
  • You also want city rankings.
IQAir review

Choose Weather Underground PWS if

  • You need station network.
  • You want to start without paying.
  • You work on Web, Mobile.
  • You also want real-time upload.
Weather Underground PWS review

Questions people ask

Is IQAir or Weather Underground PWS better?
Neither clearly leads. IQAir starts at $399/one-time and Weather Underground PWS at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IQAir or Weather Underground PWS?
Weather Underground PWS has a free tier; the other does not. Paid plans start at $399/one-time for IQAir and Free for Weather Underground PWS.
Does IQAir or Weather Underground PWS run on more platforms?
IQAir runs on Web, iOS, Android, Hardware. Weather Underground PWS runs on Web, Mobile.
Can I use Weather Underground PWS for free?
Yes. Weather Underground PWS has a free tier, so you can try it without paying. IQAir starts at $399/one-time.
What is IQAir best used for?
IQAir is most often used for checking real-time outdoor and indoor air quality (aqi, pm2.5, etc.) via the airvisual app, getting air quality forecasts for a location, remotely monitoring and controlling iqair air purifiers from a smartphone, integrating air quality/weather data into third-party apps via the airvisual api. Of those, checking real-time outdoor and indoor air quality (aqi, pm2.5, etc.) via the airvisual app and getting air quality forecasts for a location are not what Weather Underground PWS is typically brought in for.
What can IQAir do that Weather Underground PWS cannot?
IQAir covers Global AQI data, City rankings, Health recommendations, Forecasts. Weather Underground PWS covers Station network, Real-time upload, Quality control, Community rankings. Both handle Historical data, Web support, Api support.

Answered from the vendors’ own pages

IQAir: What does IQAir do?

IQAir is a Swiss company providing two main services: air purification hardware (home and commercial air purifiers and filters) and air quality monitoring (real-time global air quality data from 80,000+ sensors worldwide, accessible via the AirVisual app and IQAir.com).

Source
Weather Underground PWS: Is there a cost to join the Weather Underground Personal Weather Station network?

No cost is disclosed for joining the Weather Underground PWS network. The site encourages users to join and contribute weather data.

Source
IQAir: How much do IQAir air purifiers cost?

IQAir air purifiers range from $399 for portable Atem models to $949 for the HealthPro Plus. The new Atem Eco model is $799.99. Replacement filters cost $199.99 and last 1-4 years depending on usage.

Source
IQAir: What real-time air quality data does IQAir provide?

IQAir provides real-time air quality data covering 500,000+ locations in 100+ countries, integrating data from government monitoring stations and 80,000+ IQAir-validated sensors. The platform measures PM2.5, PM10, and AQI for each location.

Source
IQAir: Does IQAir have a mobile app?

Yes. IQAir's AirVisual app is available on iOS and Android, providing real-time air quality information, AQI rankings, health recommendations, and remote control of IQAir smart air purifiers.

Source
IQAir: Is IQAir affordable compared to other air purifiers?

No. IQAir air purifiers are significantly more expensive than alternatives. The HealthPro Plus at $900 offers similar particle filtering to the Winix 5500-2 at $300. Higher cost is primarily due to superior gas filtration but poor overall value for most users.

Source
Share

Related pages

More on IQAir

More on Weather Underground PWS

Keep looking

Other head to heads