Tough sell: I just don't feel compelled to sign up. Sign up is free, right? Why not shift to gradual engagement - let me play with the app, enter a few invoice

Tough sell: I just don't feel compelled to sign up. Sign up is free, right? Why not shift to gradual engagement - let me play with the app, enter a few invoices, add a few clients etc. and then when I want to save my work have me sign up & make an informed choice about package.