I built a finance tool for freelancers because I kept seeing the same $ mistake

For the last while I've been building FLEO — an offline tool that helps freelancers see whether their projects are actually profitable, not just whether they got paid.

The thing that pushed me to build it: I kept running the same calculation for different freelancers and getting the same uncomfortable answer. Take a $3,000 project, 80 hours, a $40/hour target rate. On paper: profit. Once you subtract the value of the freelancer's own time: -$200.

Nobody prices like this on purpose. It happens because "revenue" and "profit" get treated as the same number, and because tax and rate math lives in someone's head instead of somewhere they actually update.

FLEO is my attempt to fix that without becoming Yet Another SaaS Subscription. It's a single HTML file — works offline, no account, no server, data never leaves your device. Inside: a rate calculator that reverse-engineers your hourly rate from your real cost of living, a project profit tracker that separates gross from net profit, a tax estimator covering progressive brackets and social contributions for 12 countries, and an invoice generator (including an Italian Fattura mode and EU reverse-charge).

Would love feedback from anyone here who's freelanced long enough to have been burned by a project that "made money" on paper but didn't actually pay. What would you want a tool like this to also do?

You can check it out here: https://fleo.vorneaux.com/