Oxford Reading Buddy supports the following browsers:

Windows
Edge (latest 2 versions)
Google Chrome (latest 2 versions)
Mozilla Firefox (latest 2 versions)

macOS
Safari (latest 2 versions)
Google Chrome (latest 2 versions)
Mozilla Firefox (latest 2 versions)

Linux
Firefox (latest 2 versions)
Google Chrome (latest 2 versions)

iOS
Safari (latest 2 versions)
Google Chrome (latest 2 versions)

Android
Google Chrome (latest 2 versions)
Samsung Internet (latest 2 versions)