The spreadsheet you've always wanted
Equals' marketing headline "The spreadsheet you've always wanted" stands out and works well for a handful of reasons:
Uses "The" rather than "A" to position itself as the definitive solution to spreadsheet needs
"You've always wanted" implies that existing spreadsheet solutions have left users wanting more
Creates curiosity about what makes this spreadsheet different from others
Simple and direct in a way that makes the value proposition immediately clear
Speaks to both existing spreadsheet users and those who've avoided them due to limitations (big market)
The personal address makes users feel seen and understood