NinjaZ'Oh god': There's a buried Steam help page that shows how much money you've ever spent on the platform, and you may not want to know
vxxHome - > Account - > Purchase History
I don’t know why you would use a third Party Tool that estimates your purchase when it has always been right there in your account, without estimates.
It’s been known for atleast 7 years: reddit.com/…/what_is_difference_between_totalspen…