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Weather · head to head

Foreca vs PurpleAir

Foreca logo

Foreca

Weather

Finnish precision weather data for digital services

From
Free
Rated
-
Full reviewWebsite
PurpleAir logo

PurpleAir

Weather

Real-time air quality monitoring for communities

From
$229/one-time
Rated
-
Full reviewWebsite

The short version

  • Only Foreca has a free tier, so it costs nothing to try first.
  • Each has a real cost: Foreca free version includes advertisements (only removable via paid subscription); 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).
  • They diverge on capability: Foreca covers Global forecasts, PurpleAir covers PM2.5 monitoring.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Foreca and PurpleAir actually diverge.

Attributes where Foreca and PurpleAir differ
AttributeForecaPurpleAir
Starting priceFree$229/one-time
Pricing modelUnknownone-time
Free tierYesNo
PlatformsiOS, macOSWeb, Api, Hardware
Founded19962015

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 Foreca

  • Global forecasts
  • Automotive weather
  • Mobile SDK
  • White-label apps
  • Marine weather
  • Mobile platforms
  • Automotive systems
  • Digital services

Only in PurpleAir

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

Both cover

  • Api support
  • Web support

What people use each for

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

Foreca

  • Checking hourly/daily forecasts and animated weather/radar mapsnot PurpleAir
  • Receiving government weather alerts and rain notificationsnot PurpleAir
  • Tracking air quality index and UV levelsnot PurpleAir
  • Monitoring multiple saved locationsnot PurpleAir
  • Apple Watch complications and home-screen widgets for at-a-glance weathernot PurpleAir

PurpleAir

  • Professional Worknot Foreca
  • Content Creationnot Foreca

Where each one falls short

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

Foreca

  • Free version includes advertisements (only removable via paid subscription)
  • Requires relatively recent OS versions on Apple platforms (iOS 16.4+/macOS 13.0+) per App Store listing
  • Only paid differentiator is ad removal, no deeper feature tier beyond that

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).

Pricing, plan by plan

Foreca

Free
  • Ad-free (3 months)$1.59/3 months
  • Ad-free (1 year)$4.99/year

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

Which should you pick?

Choose Foreca if

  • You need global forecasts.
  • You want to start without paying.
  • You work on iOS, macOS.
  • You also want automotive weather.
Foreca review

Choose PurpleAir if

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

Questions people ask

Is Foreca or PurpleAir better?
Neither clearly leads. Foreca starts at Free and PurpleAir at $229/one-time, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Foreca or PurpleAir?
Foreca has a free tier; the other does not. Paid plans start at Free for Foreca and $229/one-time for PurpleAir.
Does Foreca or PurpleAir run on more platforms?
Foreca runs on iOS, macOS. PurpleAir runs on Web, Api, Hardware.
Can I use Foreca for free?
Yes. Foreca has a free tier, so you can try it without paying. PurpleAir starts at $229/one-time.
What is Foreca best used for?
Foreca is most often used for checking hourly/daily forecasts and animated weather/radar maps, receiving government weather alerts and rain notifications, tracking air quality index and uv levels, monitoring multiple saved locations. Of those, checking hourly/daily forecasts and animated weather/radar maps and receiving government weather alerts and rain notifications are not what PurpleAir is typically brought in for.
What can Foreca do that PurpleAir cannot?
Foreca covers Global forecasts, Automotive weather, Mobile SDK, White-label apps. PurpleAir covers PM2.5 monitoring, Real-time map, Historical data, Community network. Both handle Api support, Web support.
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