mbtiles grouping on Ipad

Hi,
I tried to find something about grouping of mbtiles on an Ipad but I didn't.
I'm able to group mbtiles from certain sources on a pc because I can specify them by folders but I am struggling to succeed on an Ipad since I can't specify for instant from which zip file I want to group them. What am I missing?

Kind regards
Peter

Hi,
The idea here is to send to iOS a zip file, containing mbtiles files placed in separated folders. Then these folders will appear under mbtiles folder and you will be able to use them from grouping exactly the same way as on the PC.
--Philippe

That makes totally sense. Thanks a lot for the quick answer and the awesome program
Peter