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Screenshots

  • Evaporative Cooler Forecaster screenshot 1
  • Evaporative Cooler Forecaster screenshot 2
  • Evaporative Cooler Forecaster screenshot 3

About Evaporative Cooler Forecaster

Find out when you can run your evaporative cooler, based on the favorable weather conditions in your forecast. If you live in a dry, arid climate and use a whole-house evaporative cooler to keep cool, it can be hard to know when it'll actually work! Sometimes it's fine in the morning, but too humid or hot indoors later in the evening when you'll need to run the A/C. Using your outdoor weather forecast, this app gives your indoor cooler forecast! You'll get: * An easy-to-read dashboard, showing the indoor temperature and indoor humidity that your cooler would produce, right now. * Your forecast for the hours and days ahead, to know when and how long you can use Cooling mode! Or when you could switch to Fan mode for extra ventilation. Most importantly, it shows when the weather won't be cooperative, so you can switch back to A/C before it gets too sticky or hot indoors. * Your cost($) and energy(kWh) savings estimates from using a swamp cooler vs air conditioning. * Your historical weather summarized as annual reports of how effective evaporative cooling was, in terms of hours of A/C reduced, kWh saved, and dollars unspent. * Customizable settings so you can pick your own temperature comfort zone, humidity tolerance, local energy rates, A/C sizing and efficiency values, and more. Best of all, when you customize your settings, your forecast of mode changes is also updated, and you can see the effects on energy and cost savings. * Pick your specific "Pad Cooling Power" setting to match your pad's performance, for any pad type: Aspen, DuraCool mesh, Honeycomb, CellDek, etc. For fun, you can explore the cooler forecasts from other sites around the world, in the Explore tab. You can see their weather and savings data to help contrast it with your own. If you don't have a swamp cooler, you can instead use the app to judge when to run a box fan in your windows, using your personal Fan Mode comfort zone settings. Take the mystery out of running your evaporative cooler with a personalized forecast that tells you what it will feel like indoors and how to save the most with your cooler.

What’s new

Version 1.2.1 · Updated October 17, 2026

* Minor bugfix, the drum icon could get stuck when loading after a long time away. * Updated dependencies. * Now requires iOS 15.0 or newer. iOS 13.0 is no longer supported.

App privacy

The developer, John Pierce, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Location: Precise Location, Coarse Location
  • Contact Info: Email Address, Name
  • Usage Data: Product Interaction
  • Diagnostics: Other Diagnostic Data

Used for: Developer’s Advertising or Marketing, Analytics, Product Personalization, App Functionality

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Diagnostics: Crash Data, Performance Data

Used for: App Functionality

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