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Weather · head to head

PurpleAir vs WeatherBug

PurpleAir logo

PurpleAir

Weather

Real-time air quality monitoring for communities

From
$229/one-time
Rated
-
Full reviewWebsite
WeatherBug logo

WeatherBug

Weather

Fastest weather alerts with live conditions

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only WeatherBug has a free tier, so it costs nothing to try first.
  • Each has a real cost: PurpleAir purpleAir sensors are one-time hardware purchases rather than a subscription, priced $199 to $279 USD per unit for named models (PA-I-Indoor, PA-II, PA-II-SD), per the vendor's own store (archived, 2021).; WeatherBug requires persistent internet connection for real-time radar and live data
  • They diverge on capability: PurpleAir covers PM2.5 monitoring, WeatherBug covers Lightning detection.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which PurpleAir and WeatherBug actually diverge.

Attributes where PurpleAir and WeatherBug differ
AttributePurpleAirWeatherBug
Starting price$229/one-timeFree
Pricing modelone-timeUnknown
Free tierNoYes
PlatformsWeb, Api, HardwareiOS, Android, Windows, Web
Founded20151995

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 PurpleAir

  • PM2.5 monitoring
  • Real-time map
  • Historical data
  • Community network
  • API access
  • API access
  • Home Assistant
  • Data downloads

Only in WeatherBug

  • Lightning detection
  • Spark lightning alerts
  • Live conditions
  • 18 weather maps
  • Pollen data
  • School networks
  • Home weather stations
  • Smart devices

Both cover

  • Web support

What people use each for

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

PurpleAir

  • Professional Worknot WeatherBug
  • Content Creationnot WeatherBug

WeatherBug

  • Checking current conditions and forecasts from a network of local weather stationsnot PurpleAir
  • Viewing live weather radar mapsnot PurpleAir
  • Receiving severe weather alertsnot PurpleAir
  • Tracking lightning strikes near a locationnot PurpleAir

Where each one falls short

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

PurpleAir

  • PurpleAir sensors are one-time hardware purchases rather than a subscription, priced $199 to $279 USD per unit for named models (PA-I-Indoor, PA-II, PA-II-SD), per the vendor's own store (archived, 2021).

WeatherBug

  • Requires persistent internet connection for real-time radar and live data
  • Radar images are smoothed for appearance, reducing detail compared to raw radar data
  • No historical weather data available in the free version
  • Free version contains advertisements
  • Performance issues and lag reported, particularly during severe weather or high usage periods
  • Lacks direct integrations with third-party apps and home automation systems

Pricing, plan by plan

PurpleAir

$229/one-time
  • Outdoor Sensor$229/one-time
    • PM2.5 monitoring
    • Cloud connectivity
    • Map access
  • Indoor Sensor$199/one-time
    • Indoor monitoring
    • WiFi enabled
    • Real-time data

WeatherBug

Free
  • Free$undefined/mo
    • 20+ weather maps
    • 10-day forecast
    • 140+ hours hourly forecast
  • Premium$4.99/month
    • Ad-free experience
    • Extended forecasts
    • Historical data

Which should you pick?

Choose PurpleAir if

  • You need pm2.5 monitoring.
  • You work on Web, Api, Hardware.
  • You also want real-time map.
PurpleAir review

Choose WeatherBug if

  • You need lightning detection.
  • You want to start without paying.
  • You work on iOS, Android, Windows, Web.
  • You also want spark lightning alerts.
WeatherBug review

Questions people ask

Is PurpleAir or WeatherBug better?
Neither clearly leads. PurpleAir starts at $229/one-time and WeatherBug at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PurpleAir or WeatherBug?
WeatherBug has a free tier; the other does not. Paid plans start at $229/one-time for PurpleAir and Free for WeatherBug.
Does PurpleAir or WeatherBug run on more platforms?
PurpleAir runs on Web, Api, Hardware. WeatherBug runs on iOS, Android, Windows, Web.
Can I use WeatherBug for free?
Yes. WeatherBug has a free tier, so you can try it without paying. PurpleAir starts at $229/one-time.
What is PurpleAir best used for?
PurpleAir is most often used for professional work, content creation. Of those, professional work and content creation are not what WeatherBug is typically brought in for.
What can PurpleAir do that WeatherBug cannot?
PurpleAir covers PM2.5 monitoring, Real-time map, Historical data, Community network. WeatherBug covers Lightning detection, Spark lightning alerts, Live conditions, 18 weather maps. Both handle Web support.

Answered from the vendors’ own pages

WeatherBug: Does WeatherBug work offline?

Partially. WeatherBug can cache weather data when you have an internet connection, allowing you to view cached information offline. However, real-time radar and live data require an active internet connection.

Source
WeatherBug: What weather maps and radar layers does WeatherBug include?

WeatherBug includes over 20 weather maps including Radar, Future Radar (1-hour), Lightning, Pollen, Severe Storm Risk, and Precipitation. The free version includes a 10-day forecast and over 140 hours of hourly forecast data.

Source
WeatherBug: Is there a cost to use WeatherBug?

WeatherBug is free with ads. Premium subscription costs $4.99 per month for ad-free experience and includes extended forecasts and historical data.

Source
WeatherBug: Can I customize weather alerts?

Yes. WeatherBug allows customizable alerts for severe weather conditions including lightning, storms, and precipitation.

Source
WeatherBug: What platforms is WeatherBug available on?

WeatherBug is available on iOS, Android, Windows, and the web. The desktop app provides real-time weather updates, interactive maps, live radar, and detailed forecasts.

Source
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