TB categories in other apps ?

[pete of ebor]

Probably a long shot, but does anyone know of any iphone or Android calendar apps which can read the category of a Thunderbird & Lightning event and colour it the way TB&L does ? I know the category type is carried in the event data because I have TB&L on two pcs one running Win 10 and the other Lubuntu, and I use Google Calendar as a "go between". I know that the category is preserved between the two machines even when the event gets from one to the other via Google Calendar, even though Google Calendar does not display the category.