It's compatible with Microsoft Office (Word, Excel, PowerPoint), Google Docs, Google Sheets, Google Slide & OpenOffice format.
Trio Office can open & edit many kinds of files:
[Text]
• OpenDocument (.odt .ott .oth .odm )
• Open Office (.sxw .stw .sxg)
• Word 6.0/95/97/2000/XP/Mac) (.doc .dot)
• Word 2003 XML (.xml)
• Word 2007/2010 XML (.docx .docm .dotx .dotm)
• WinWord 5 (.doc)
• WordPerfect (.wpd)
• Microsoft Works (.wps)
• Lotus WordPro (.lwp)
• Abiword (.abw, .zabw)
• ClarisWorks/Appleworks Document (.cwk)
• MacWrite (.mw .mcw)
• Rich Text (.rtf)
• CSV (.csv and .txt)
• StarWriter/ Star Writer (.sdw .sgl .vor)
• DocBook (.xml)
• Unified Office (.uot .uof)
• Ichitaro 8/9/10/11 (.jtd .jtt)
• Hangul WP 97 (.hwp)
• T602 (.602, .txt)
• eBook (.pdb)
• Apple Pages 4 (.pages)
• HTML (.htm, .html)
[Spreadsheets]
• OpenDocument (.ods .ots .fods .sxc .stc)
• Excel 97/2000/XP (.xls .xlw .xlt)
• Excel 4.x–5.0/95 (.xls .xlw .xlt)
• Excel 2003 XML (.xml)
• Excel 2007/2013 XML (.xlsx .xlsm .xlts .xltm)
• Excel 2007/2010 binary (.xlsb)
• Lotus 1-2-3 (.wk1 .wks .123)
• Data Interchange (.dif)
• Rich Text (.rtf)
• Text CSV (.csv .txt)
• StarCalc (.sdc .vor)
• dBASE (.dbf)
• SYLK (.slk)
• Unified Office (.uos .uof)
• HTML (.htm .html files, including Web page queries)
• Quattro Pro 6.0 (.wb2)
• Apple Numbers 2 (.numbers)
[Presentations]
• OpenDocument (.odp .odg .otp .fopd .sxi .sti)
• PowerPoint 97/2000/XP (.ppt .pot .pptx .pptm .potx .potm)
• StarDraw and StarImpress (.sda .sdd .sdp .vor)
• Unified Office (.uop .uof)
• CGM (.cgm)
• PDF (.pdf)
• Apple Keynote 5 (.key)
[Graphic]
• OpenDocument (.odg .otg .sxd .std)
• Photoshop (.psd)
• AutoCAD (.dxf)
• Corel (.cdr .cmx)
• Publisher 98-2010 (.pub)
• Visio 2000-2013 (.vdx .vsd .vsdm .vsdx)
• WordPerfect (.wpg)
BMP JPEG, JPG PCX PSD SGV WMF
DXF MET PGM RAS SVM XBM
EMF PBM PLT SDA TGA XPM
EPS PCD PNG SDD TIF, TIFF
GIF PCT PPM SGF VOR
[Formula]
• OpenDocument (.odf .sxm)
• StarMath (.smf)
• MathML (.mml)
Comments and Reviews
Trio Office seems to be a paid copy of LibreOffice. So you better should get LibreOffice.
Only available through the Microsoft Store i.e. for Windows 10 and above.
According to Microsoft Store reviews; this is junk. Please avoid.