I had to create a small simulator[0] a few months ago to figure out my personal finances for my first job and to figure out how early I could move out without acquiring debt. I wanted to compare different options so I could weigh the impact of my decisions on how much money I could save.

I like the idea of plans but they feel a bit bulky to use and you can't compare them. If you could directly compare plans against each other I think I would find it more useful. Also making them faster to create could be nice. I can change all the defaults in the actual view so why force me to go through the pages?

I do like the stacked breakdown of each plan and the behind the scenes calculation of taxes, investing and inflation.

[0]: https://gist.github.com/Rafael09ED/61568afa8a2308b53917915ee...