I lost €3K to a chargeback. Customer used my product for months, then told their bank "never heard of them." I had zero proof. So I built Revano. An API that logs your users' in-app activity (logins, actions, devices) and packages it into encrypted evidence you can submit when a dispute hits. Your payment processor knows someone paid. Revano proves they actually used your product. That's what wins disputes. Built for apps and software companies tired of losing money to friendly fraud.