Comparison

Mistral Weather vs OpenWindow

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

Head to head
About

Mistral Weather

Get detailed current weather, hour-by-hour, and 7-day forecasts with animated radar maps. Explore historical weather data for any date and save multiple locations. An optional AI feature provides natural language summaries of the forecast.

Highlights
  • Current conditions and 7-day forecast
  • Animated precipitation radar map
  • Sun and moon times
  • Historical weather data ('On This Day')
  • Save multiple locations
  • Home Screen widgets
  • AI-powered forecast summaries
Features
Read full description

Mistral Weather is a modern weather app for iPhone and iPad. Open it and see current conditions, hour-by-hour and 7-day forecast, sun and moon times, humidity, UV, wind, and pressure at a glance. A layered weather map shows animated precipitation radar, temperature, and wind. "On This Day" surfaces historical weather for today's date from the last 40+ years — a fun way to see how today stacks up. All forecast data comes from Open-Meteo, and no account or sign-in is required. Launch the app and grant location access to get a localized forecast, or skip it and use the search to add any place on Earth. Save multiple locations and switch between them with a tap. Pick your favorite layer on the map — temperature, radar, or wind — and watch weather systems move in real time. Home Screen widgets show the current forecast in small, medium, and large sizes, plus an "On This Day" widget in small and medium. Background refresh keeps widget data current without draining battery. Customize units (°F / °C, mph / km/h), adjust map defaults, and manage Remove Ads and Mistral Weather AI from Settings. Upgrade to Mistral Weather AI for a natural-language summary of today's forecast on the main Weather tab. One quick read covers what's happening right now, what's coming in the next few hours, and what to wear or plan for — refreshed each hour, powered by OpenAI behind our server. Subscribers also have banner ads removed automatically. The subscription is $6.99/month or $59.99/year, which renews until canceled in Settings. All forecasts, locations, and preferences are stored on your device. Coordinates are sent to Open-Meteo only when fetching weather; nothing else is transmitted. The app is free with a single banner ad at the bottom of the main surfaces — purchase Remove Ads for a one-time fee to remove it permanently, or let a Mistral Weather AI subscription remove ads automatically while it's active. Mistral Weather uses Google AdMob and asks for App Tracking Transparency so ads can be personalized; declining is fully supported. Mistral Weather is an independent project and is not affiliated with Open-Meteo, Apple, or Google. Privacy Policy: https://mistralweather.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

OpenWindow

This app provides clear, practical recommendations on whether to open your windows or go outside. It combines local weather and air-quality data into simple guidance for everyday decisions.

Highlights
  • Window and outdoor activity recommendations
  • Hourly weather and air quality outlooks
  • Local and manual location search
  • Saved default location
  • Unit preferences
  • Light and dark mode
Features
Read full description

OpenWindow helps you decide when the air outside is worth letting in. Check whether it is a good time to open your windows or go outside using local weather and air-quality conditions. OpenWindow combines temperature, humidity, precipitation, wind, visibility, UV, and air-quality data into clear, practical recommendations. Instead of making you interpret every weather metric yourself, OpenWindow gives you simple guidance for two everyday questions: - Is it a good time to open the windows? - Is it a good time to go outside? Features: - Current recommendations for windows and outdoor activity - Hourly outlooks so you can plan around better conditions - Weather and air-quality data powered by Open-Meteo - Current-location lookup with optional location permission - Manual location search if you prefer not to use device location - Saved default location for quick checks - Unit preferences for temperature, wind, visibility, and more - Light and dark mode support - No account required OpenWindow is built for quick, low-friction decisions: checking the room before opening a window, planning a walk, timing errands, or seeing whether air quality makes staying inside the better call. Location access is optional and used only to fetch local weather and air-quality data. You can always search for a location manually instead.

Screenshots

Mistral Weather4 screens
OpenWindow4 screens

Verdict

The call

The clearest difference is in-app purchases: OpenWindow at none against Mistral Weather's 3. OpenWindow also leads on ads (none vs shown) and update cadence (every 3 days vs fortnightly). Mistral Weather's advantage is iOS requirement (18.0 vs 26.0). On price, rating, ratings volume 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. Mistral Weather sells 3 in-app purchases, starting at $6.99 per month. OpenWindow asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Mistral Weather against 5.0 for OpenWindow. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Mistral Weather ships an update fortnightly, OpenWindow every 3 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

Scorecard5 real differences · 5 level
Mistral Weather versus OpenWindow: the parameters behind the verdict, then further details
ParameterMistral WeatherOpenWindow
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyFortnightlyEvery 3 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS18.0 — better26.0
Further details — not scored
Size30 MB18 MB
Age rating4+4+
DeveloperClarved Inc.South Bay Compute, LLC

Customer experience

Mistral Weather

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

OpenWindow

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Mistral Weather

Subscriptions2
  • Mistral Weather AI (Monthly)$6.991 Month
  • Mistral Weather AI (Yearly)$59.991 Year
One-time1
  • Remove Ads$3.99
None

OpenWindow

No in-app purchases

Questions

Is Mistral Weather free?
Mistral Weather is free to download, with in-app purchases available.
Is OpenWindow free?
OpenWindow is free to download, with no in-app purchases.
Which has better reviews, Mistral Weather or OpenWindow?
Mistral Weather and OpenWindow are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Mistral Weather or OpenWindow have ads?
Mistral Weather shows ads; OpenWindow does not.
Which is updated more often, Mistral Weather or OpenWindow?
Mistral Weather ships an update fortnightly, and OpenWindow every 3 days. Most recently, Mistral Weather was updated on October 31, 2026 and OpenWindow on November 5, 2026.

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