To download the WorldRemit app, simply visit the App Store on iOS devices or Google Play Store on Android devices. Search for 'WorldRemit' and look for the official app by WorldRemit Ltd. Once you find it, tap 'Download' or 'Install' to begin the process. After the app is installed, open it and follow the prompts to set up your account. If you need assistance, check their official website or contact their support for help.