Browsers
The two most recent versions of:
Chrome on Mac
Chrome on Windows
Chrome on Android
Safari on Mac
Safari on iOS
Firefox on Mac
Firefox on Windows
Edge on Windows
Support in other browsers is not restricted but is untested.
Android
Ocasta Engage - Requires Android 5.1 and up
Ocasta Albert - Requires Android 4.4 and up
iOS
Ocasta Engage - iOS 11.4 and later running on iPod touch, iPhone and iPad.
Ocasta Review - iOS 11.4 and later running on iPod touch, iPhone and iPad.
Ocasta Albert - iOS 10.3 and later running on iPod touch, iPhone and iPad.