Check My Subscriptions reads a bank or credit card statement and surfaces every recurring charge hiding in it: the trials that quietly converted, the services you stopped using, the duplicate subscriptions. It runs in the browser, it is free, and it takes about a minute to see what you are really paying for each month.
Point it at a bank or credit card statement and it finds the recurring charges inside.
The scan happens on your device, in the page. Free to use.
One pass shows what you actually pay for each month, so you can cancel what you no longer use.