Comparison

Rain? vs Air Quality ◎

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

Head to head
About

Rain?

Features
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Rain? answers one simple question: how likely is it to rain in the next 30 minutes? Open the app and instantly see your rain probability as a single, bold number. The screen fills with animated water proportional to the chance of rain — the higher the likelihood, the higher the water rises. Inspired by the Apple Watch depth gauge, it turns weather data into something you can feel at a glance. Beneath the headline number, a minute-by-minute chart breaks down the next half hour so you can see exactly when rain is expected to arrive, peak, or clear. A trend indicator shows whether conditions are building, easing, or holding steady. No clutter. No ten-day forecasts. No hourly temperature graphs. Just the one thing you actually need to know before you step outside. How it works: Rain? uses Apple WeatherKit to pull minute-by-minute precipitation data for your exact location. Your location is sent directly to Apple's weather service and is never stored, tracked, or shared. The forecast updates with a single tap. Features: Real-time rain probability for the next 30 minutes Animated water-fill display that rises with rain likelihood Minute-by-minute precipitation chart Trend indicator showing increasing, decreasing, or steady conditions Hyperlocal forecasts powered by Apple WeatherKit No ads, no accounts, no tracking Designed for one-handed, one-second use Rain? requires location access to provide forecasts. Weather data is powered by Apple Weather.

About

Air Quality ◎

Get real-time air quality information for your city, including the main pollutant and its cause. Receive alerts for air quality changes and customize notifications based on your sensitivity profile. A widget provides at-a-glance updates without opening the app.

Highlights
  • Real-time AQI and pollutant concentration
  • Supports multiple international AQI scales
  • Weather factors explained
  • Global pollution map and city ranking
  • Customizable alerts
  • Personalized sensitivity profiles
  • Home screen widget
Features
Read full description

What you are breathing, at a glance. An index with no explanation is useless. Air Quality shows your city's level in real time, the pollutant pushing it up, the weather behind it, and one clear call: go out now, or wait until this evening. No account, no sign-up, no email address to hand over. THE INDEX, IN REAL TIME Your city's level, updated continuously, with the pollutant responsible and its concentration: PM2.5 and PM10 particulate matter, nitrogen dioxide, ozone, sulphur dioxide, carbon monoxide. When wildfire smoke drifts in, fine particles are what tell you first. YOUR COUNTRY'S OWN SCALE In the United States the app uses the AQI you already know, from 0 to 500. Travel, and it switches to the official scale of wherever you are: the European index, Canada's AQHI, the UK's DAQI, Korea's CAI, and the Japanese, Mexican, Australian and Brazilian scales. Nine scales in all, and you can force your own. THE WEATHER THAT EXPLAINS IT Wind disperses particles, heat manufactures ozone, rain washes the air. A discreet strip ties every move of the index to its cause, in one sentence. This is an air quality app, not a weather app: the weather is there to explain, never to take over the screen. MAP AND RANKING A pollution layer over the world map, monitoring stations where they exist, and a ranking of major cities so you can place your own. ALERTS THAT ACTUALLY WARN YOU A notification when the air degrades in one of your cities, and another when it is breathable again. You set the threshold, the app keeps watch. YOUR SENSITIVITY PROFILE Asthma, heart condition, young child, older adult, pregnancy, outdoor sport: tick what applies to you. The app then watches the pollutants that affect you first and warns you earlier, without ever altering the readings it shows. ON YOUR HOME SCREEN A widget shows your city's level without opening the app. YOUR DATA STAYS WITH YOU No account, no advertising profile built on your health. Your reading history is stored on your device. PREMIUM The free version gives you today's index, the map, the ranking, the widget and one tracked city. Premium adds: no ads, five-day forecasts, up to 50 cities, alerts, twelve months of history and CSV export of your readings. Monthly or yearly subscription — a seven-day free trial on the yearly plan — or a one-time lifetime purchase. Prices for your country are shown inside the app. Payment is charged to your Apple account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage and cancel them in your Apple account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ General terms: https://airquality.devolim.fr/en/terms.html Subscription terms: https://airquality.devolim.fr/en/subscription.html Privacy: https://airquality.devolim.fr/en/privacy.html Data: Copernicus / CAMS via Open-Meteo. Air Quality provides environmental information. It is not a medical device and does not replace the advice of a health professional.

Screenshots

Rain?4 screens
Air Quality ◎4 screens

Verdict

The call

The clearest difference is ads: Rain? at none against Air Quality ◎'s shown. Air Quality ◎'s advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, 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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 6 level
Rain? versus Air Quality ◎: the parameters behind the verdict, then further details
ParameterRain?Air Quality ◎
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 2 monthsEvery 2 months
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size1 MB75 MB
Age rating4+12+
DeveloperJames Davie LimitedDevolim

In-app purchases

None

Rain?

No in-app purchases

None

Air Quality ◎

No in-app purchases

Questions

Is Rain? free?
Rain? is free to download, with no in-app purchases.
Is Air Quality ◎ free?
Air Quality ◎ is free to download, with no in-app purchases.
Do Rain? or Air Quality ◎ have ads?
Air Quality ◎ shows ads; Rain? does not.
Which is updated more often, Rain? or Air Quality ◎?
Rain? ships an update every 2 months, and Air Quality ◎ every 2 months. Most recently, Rain? was updated on October 3, 2026 and Air Quality ◎ on October 10, 2026.

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