Yes, it is true that it is running a LO Calc binary. Not implying that you don't already know, but this may be of interest in terms of Calc/Excel compatibility

Yes, it is true that it is running a LO Calc binary. Not implying that you don't already know, but this may be of interest in terms of Calc/Excel compatibility: https://wiki.documentfoundation.org/Feature_Comparison:_LibreOffice_-_Microsoft_Office#Spreadsheet_applications:_LibreOffice_Calc_vs._Microsoft_Excel https://wiki.documentfoundation.org/Feature_Comparison:_Libr... I have used the tool predominantly with xlsx format spreadsheets created in Excel.