iPhone Screenshots


This app uses your location to determine the local weather conditions, and what a properly working Evaporative Cooler will provide for cool air. Based on the local forecast, this app also projects the indoor temperature for the day. You don't have to doubt if your cooler is working properly, now you can check its efficiency with this convenient utility.

In addition, this utility will give you a local weather forecast and show weather alerts for your area. This app is perfect for desert environments where Evaporative Coolers (Swamp Coolers) are the primary means of cooling a building.

What’s New

Version 1.4.3

Updated for iOS 11 support.
Added GPH Calculation

Ratings and Reviews

4.3 out of 5
11 Ratings

11 Ratings

Maria,Phoenix ,

Use with Apple Watch?

Great and very useful app. Especially when I’m working in my Phoenix hangar in the summer. However it would be great to access it on my watch without finding where I left my iPhone.

tellitstraight ,

Weather Forecast in Incorrect

Would be a useful app, however, the weather temperature and forecast are incorrect. Perhaps they are from another region? Does not correlate with my area’s temp. and forecast (El Paso, TX). Please fix.

Developer Response ,

The app requires access to your location services to correctly lookup your forecast. This can by bypassed by using the settings, and entering local GPS coordinates. What device are you using and what iOS? We would be glad to test further with you.

jcbnpsca ,

Inaccurate temperature estimates

The predicted EvapCoolCalc is inaccurate. The ap predicts temperature much lower than what is actually produced by any cooler. Add 8 degrees to the displayed value and it will be close to actual.


Edward Czajka
27.2 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
You must be at least 17 years old to download this app.
Unrestricted Web Access
© Edward Czajka


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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