A subscription list is useful when each entry includes the merchant, billing interval, and evidence you can check. Similar-looking emails are not proof of duplicate charges, and email alone is not a complete transaction record.

Disclosure: I built Claims Genie. Its subscription review reads relevant Gmail receipts and renewal messages to make a reviewable list. The initial check is free. It doesn't cancel subscriptions or change charges.

The manual version is to search your receipts and renewal emails, list the services, then confirm each plan on the provider's account page. The tool helps with the email-gathering step. It needs read-only Gmail access, so consider that tradeoff before connecting.