Can I use a Vaavud wind meter with an iPhone 4?

Ultrasonic: will not work with the Iphone 4.

Handheld: The latest (and future) releases of the app require iOS 8, which means that they will not work on an iPhone 4. However, you can download an older version of the app that works for the iPhone for using the following steps:

  1. Download the iTunes app to your Mac or PC. http://www.apple.com/itunes/download/
  2. Log in to iTunes using the same Apple ID that you use on the phone.
  3. Find the Vaavud app in iTunes. You can search for Vaavud in iTunes or follow this link and click “Open in iTunes”: https://itunes.apple.com/app/vaavud-wind-meter/id674991854
  4. Click the Get button.
  5. Now you can go to the AppStore on your phone and download an older version.