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Weather · head to head

PurpleAir vs Ventusky

PurpleAir logo

PurpleAir

Weather

Real-time air quality monitoring for communities

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

Ventusky

Weather

Beautiful weather maps from Czech developers

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Ventusky 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).; Ventusky the Premium subscription page names two tiers, Premium and Premium plus, capped at 4 and 25 devices respectively, but publishes no price for either, showing a dash where the figure would appear
  • They diverge on capability: PurpleAir covers PM2.5 monitoring, Ventusky covers Animated weather maps.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which PurpleAir and Ventusky actually diverge.

Attributes where PurpleAir and Ventusky differ
AttributePurpleAirVentusky
Starting price$229/one-timeFree
Pricing modelone-timefree
Free tierNoYes
PlatformsWeb, Api, HardwareWeb, Ios, Android

Identical on both: user rating (Not yet rated), category (Weather), founded (2015).

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 Ventusky

  • Animated weather maps
  • Multiple forecast models
  • Wind visualization
  • Temperature maps
  • Precipitation forecasts
  • Web embedding
  • Ios support
  • Android support

Both cover

  • Web support

What people use each for

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

PurpleAir

  • Professional Worknot Ventusky
  • Content Creationnot Ventusky

Ventusky

  • Interactive weather forecast, radar and wind mapping, with a paid Premium tier for unlimited layers and forecasts beyond 7 daysnot 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).

Ventusky

  • The Premium subscription page names two tiers, Premium and Premium plus, capped at 4 and 25 devices respectively, but publishes no price for either, showing a dash where the figure would appear

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

Ventusky

Free
  • FreeFree
    • Weather maps
    • Multiple models
    • Forecasts

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 Ventusky if

  • You need animated weather maps.
  • You want to start without paying.
  • You work on Web, Ios, Android.
  • You also want multiple forecast models.
Ventusky review

Questions people ask

Is PurpleAir or Ventusky better?
Neither clearly leads. PurpleAir starts at $229/one-time and Ventusky at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PurpleAir or Ventusky?
Ventusky has a free tier; the other does not. Paid plans start at $229/one-time for PurpleAir and Free for Ventusky.
Does PurpleAir or Ventusky run on more platforms?
PurpleAir runs on Web, Api, Hardware. Ventusky runs on Web, Ios, Android.
Can I use Ventusky for free?
Yes. Ventusky 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 Ventusky is typically brought in for.
What can PurpleAir do that Ventusky cannot?
PurpleAir covers PM2.5 monitoring, Real-time map, Historical data, Community network. Ventusky covers Animated weather maps, Multiple forecast models, Wind visualization, Temperature maps. Both handle Web support.

Answered from the vendors’ own pages

Ventusky: What subscription tiers does Ventusky Premium offer?

Ventusky offers Premium and Premium+ subscriptions. Both are billed yearly and include unlimited layers, forecast maps beyond 7 days, advanced widgets, notifications, and priority support.

Source
Ventusky: What is the difference between Ventusky Premium and Premium+ tiers?

Both tiers include the same features but support different numbers of devices. Premium supports up to 4 devices, while Premium+ supports up to 25 devices.

Source
Ventusky: Can I cancel my Ventusky subscription after signing up?

Yes, you may cancel at any time. Subscriptions renew automatically, but you can stop renewal at any point.

Source
Ventusky: Will I get a refund if I cancel mid-subscription?

No, payments for the current subscription period are non-refundable. Your access will continue until the end of the prepaid period after which it stops.

Source
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