I think I have a mental friction on paying monthly based on how much I interact with the software, so it might be me.
I'm not sure how I feel about the persisting being a premium feature yet, I have to play with the software a bit more. It might be that a tier in-between with just persisting would solve the problem, but it could just be that I haven't realized the software' s full potential.
You get a lot of points for making it work well with the phone, I was really surprised.
What made it surprising is that usually diagrams and tables display horribly on phone in most apps. This app is centered around those and works well, which is literally amazing.
I put in some serious numbers and it looks great. Now I'm a bit concerned for the last 3 years of my life, lol
I will definitely want the "tax adjustment" feature, I'm very happy you provided the "lifetime" option.
Do you have a "plan" in case everything goes wrong and you don't have enough funds? I wouldn't want to lose all the planning. That being said, the software is incredibly good, I don't expect that to be a thing.
Otherwise, it's too expensive for cheap fire-minded folks like myself. Adding a subscription to this would push back our FIRE dates :)
Persistent storage (even if it's just a text file I have to copy-paste every time) for $12/ a year would add enough value to be worth it for me, and for me to replace my spreadsheet with this.