As of about AOS 4.1 FinalCalc (my version 1.05) seems to work pretty fully (on AmigaNG native screens). I use it not heavily but frequently on both spreadsheets created previously (on AOS3) and new ones.Its one flaw is that resizing the spreadsheet window can be extremely tedious.The Hisoft URL no longer sells software, but appears to be the same person/people, so they may respond to questions.