You can download the app for free to your phone from Google Play if you own a mobile phone with Android operating system (supported versions of the operating system are Android 9+). Just click on the Google Play Store app on your phone, search for the Slovensko v mobile app and click on the Install button.
If you are an iPhone owner (supported operating system versions are iOS 13+), click on the App Store app and follow the same steps, i.e. search for the Slovensko v mobile app and select the Install icon.
Then simply activate the app. For instructions on how to activate the app, visit Online app activation page.