Yeah, I think many startups have a fairly long customer/product development period where their revenue will be $0, and then quickly pour on the gas once they have users and want to monetize.
I wish the tool had an additional degree of freedom, which is "time until first revenue". That would let you model how much time-to-market is costing you until breakeven, and trade off a business idea that generates revenue immediately vs. another business idea that takes a long time to incubate but may have a higher growth rate. I guess you can figure it out with some quick mental math (just multiply monthly expenses by time-to-market and add that on to capital required, and add the time-to-market on to the breakeven time), but if it were in the tool it'd be easier to visually see the effects of different choices there.
I wish the tool had an additional degree of freedom, which is "time until first revenue". That would let you model how much time-to-market is costing you until breakeven, and trade off a business idea that generates revenue immediately vs. another business idea that takes a long time to incubate but may have a higher growth rate. I guess you can figure it out with some quick mental math (just multiply monthly expenses by time-to-market and add that on to capital required, and add the time-to-market on to the breakeven time), but if it were in the tool it'd be easier to visually see the effects of different choices there.