All our customers who purchased Heliosy can get Heliosy 2 for free.

Only requirement is that your device must run iOS 10. Devices running older version of iOS will continue to use older version of Heliosy.

As Heliosy 2 require iOS 10, make sure your device is upgraded to iOS 10 before trying to download latest version of Heliosy application.
Once your device is running iOS 10, you just have to run 'App Store' application and download Heliosy 2.