Meh, looks nice and UX is OK, but not really useful IMO.<p>Often, growth means that operating cost also grow, e.g., due to higher infrastructure cost, more worker salaries, expansion into more economic markets with more/new regulations to tackle, ....<p>That could be at some fixed percentage in a simple model, and is a quite relevant factor which this tool completely misses.<p>So go for that spreadsheet, it can start really simple, with minimal parameters like this has - but being able to adapt and expand it over time as ones business growths and changes allows for much better and more efficient planning.