Would it be useful to build an online CapRate calculator?

[William Howley]

hi, in addition to real estate, I am a professional web developer. I often find myself calculating cap rates in excel. do you think it would be useful to create an online application that could allow you to input your cap rate information, see the results, and then save the cap rate profile so it was capable of sharing the link with someone? 

I understand that regular cap rate calculators exist, but does anyone know of a cap rate calulator that saves your information and allows you to share the links etc? 

let me know your thoughts!