Solo builder here — currently working on a tool for freelance profitability

Hey everyone,
i'm a solo builder currently working on a small tool called ClientProfit.

While talking with freelancers and consultants I kept noticing the same issue: most people track revenue, but almost nobody tracks profit per client.

Which leads to situations where the highest-paying clients aren't always the most profitable because of meetings, revisions and hidden workload.

So I'm building ClientProfit to help freelancers understand which clients actually make them money.

Still very early, but I'm excited to share the journey here and learn from the community.

Curious to hear from other freelancers here:
do you track profitability per client, or mostly revenue?