What operating systems (Apple, Mac, Android, Kindle and Windows) are currently supported?

Current operating systems supported are: 

• Windows 10 with current Edge Browser 
• IOS 11 and Above. (iPad, iPhone) and (10.12 – 10.15.6 Mac)) 
• Android Version 6 (Latest is Version 10) 
• Private or incognito browsing modes are not officially supported