Comparison

SJVAir vs ForeCats

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SJVAir

Track your local air quality in real-time with hourly PM2.5 concentration data. Receive outdoor activity guidelines and get live notifications when air quality becomes hazardous. Explore a monitor map and view historical data.

Highlights
  • Real-time air quality monitoring
  • Hourly PM2.5 concentration data
  • Outdoor activity guidelines
  • Hazardous air notifications
  • Monitor map with historical data
  • Data download for analysis
Features
Read full description

Monitor your local air quality in real time! Keep any eye on your local air quality and receive outdoor activity guidelines based on hourly fine particle pollution (PM2.5) concentration. Going out for the day? Enable "Auto Update" in the app's settings menu and get live notifications when you enter hazardous air! Take advantage of real time data with SJVAir's Monitor Map. Utilize the full SJVAir monitor network, as well as viewing AirNow and other PurpleAir monitors that have been deployed in the San Joaquin Valley. View past trends and historical data for every monitor on the map, or download the data to start making your own analysis and infographics!

About

ForeCats

Features
Read full description

A charming cat clock that tells time and feels the weather. This is a simple clock app that shows the current time and the weather at your location — but with a twist. The weather forecast comes from a cat, so please don’t rely on it too much. When rain might be coming, the cat may start washing its face. On sunny days, the cat relaxes and looks happy. Instead of numbers and charts, you can sense today’s weather through the cat’s little behaviors. Inspired by the old saying, “When a cat washes its face, it may rain.” This app is not about accuracy. It’s about enjoying time and weather in a gentle, playful way — together with a cat.

Screenshots

SJVAir4 screens
ForeCats4 screens

Verdict

The call

The clearest difference is ads: SJVAir at none against ForeCats's shown. SJVAir also leads on update cadence (monthly vs every 5 months). ForeCats's advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SJVAir ships an update monthly, ForeCats every 5 months. The most recent releases landed on November 3, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 6 level
SJVAir versus ForeCats: the parameters behind the verdict, then further details
ParameterSJVAirForeCats
PriceFreeFree
Rating4.5 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyMonthly — betterEvery 5 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size6 MB31 MB
Age rating4+4+
DeveloperCentral California Asthma Collaborativemasahiro takei

In-app purchases

None

SJVAir

No in-app purchases

None

ForeCats

No in-app purchases

Questions

Is SJVAir free?
SJVAir is free to download, with no in-app purchases.
Is ForeCats free?
ForeCats is free to download, with no in-app purchases.
Do SJVAir or ForeCats have ads?
ForeCats shows ads; SJVAir does not.
Which is updated more often, SJVAir or ForeCats?
SJVAir ships an update monthly, and ForeCats every 5 months. Most recently, SJVAir was updated on November 3, 2026 and ForeCats on October 24, 2026.

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