The Rooli Casino app can be downloaded from the official website or through app stores applicable to your device's operating system. To download, visit the casino's homepage and navigate to the mobile app section. Links for Android and iOS apps will be available, directing users to Google Play Store or Apple App Store. Ensure your device meets the app’s requirements for a smooth installation process. After downloading, log in with your casino account details to access a wide range of games and features on the go.