To use the Lotus 365 betting app, users typically need to get a referral or contact an agent through WhatsApp or Telegram. The app is not available on Google Play Store or Apple App Store due to gambling restrictions, so it must be downloaded via an APK file from unofficial sources. After downloading, users must enable "install from unknown sources" on their device settings. While the app is easy to install, downloading from third-party sites carries security risks, such as malware or data theft. Always verify the source and understand the potential dangers before installation.