The Speed of Sound in Air, where you are.

The Cair app calculates the Speed of Sound in Air from the air temperature, air pressure, and air humidity, optionally using the local conditions. If your device supports it, Cair is able to get the local air pressure directly from the device. There are popups to see the values in both metric and imperial units, and you can pick your preferred units for the main display of the values.

Cair can pass it's calculated Speed of Sound to another dgApps app, Lambda version 2.0.0 and newer. Lambda can use the Cair calculated Speed of Sound in it's calculation of frequency, wavelength, and musical note. Cair is a universal app, equally at home on an iPhone as on a iPad. In Split Mode on an iPad device, side by side with Lambda, the calculated Speed of Sound in Air is passed in real time to the Lambda app.

Cair allows you to share it's calculated Speed of Sound in Air via all the usual sharing methods.

What’s New

Version 3.0.0

Totally removed Crashlytics and Answers. The only analytics and crash reporting of any sort is now via Apple, if you've (hopefully!) opted in to that.
iOS 13.2 and up now.
Now using SwiftPackages.
Now using *weatherstack for local weather values.
UI updated to work on all current devices.

App Privacy

The developer, dgApps, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

More By This Developer

You May Also Like