@andrejk Hello!

Please download the application from the Google Store:

https://play.google.com/store/apps/details?id=com.guio.guioapp

or via the Play Store on your device.

After installing, navigate to: Settings -> Unlock pro and Select GUI-O Pro to initiate the Google Store purchase flow.

If you have any further questions, please feel free to ask.

Best regards,
kl3m3n