You can download the Secure Student Browser directly from the Google™ Chrome store And from the Apple™ App Store by clicking the respective links.
Google Chrome Store: https://chrome.google.com/webstore/detail/riverside-datamanager/gngadipbljmmcgcjjflidckpbgebnhod?hl=en
Apple App Store: https://apps.apple.com/us/app/riverside-datamanager/id955001987
NOTE: Devices locked out of purchasing will receive an error when following the links. Please see the administrator of the device to manage app installation.