Back when I was working on another startup, I hired a freelancer friend to create "The Freelance Rate Calculator" [0], which ended up on Sourceful a few months later. Before that, it went viral on Twitter (112,570 impressions) [1] and brought in a ton of traffic to my startup's home page.

Ever since then, I can't shake the feeling that I should probably turn it into a simple SaaS app.

It really made me think that nicely designed Google Sheets documents are probably the perfect way to prototype some applications. They're free, fast to build, and anyone can access them... And, apparently, you can get them to look pretty damn nice.

[0] https://sourceful.co.uk/doc/101/the-freelancer-rate-calculat... [1] https://twitter.com/panphora/status/1094081680166531072