To find your trial end date, next billing date, update your payment method or cancel a subscription purchased on an Android device, log in to your Google Play account at play.google.com/store/account. Under Subscriptions, choose HISTORY Vault to view, edit or update your subscription.
If do not see an active HISTORY Vault subscription in your Google Play account, you may have subscribed on a different platform. You can find instructions for looking up your subscription information here: I'm not sure where I originally subscribed to HISTORY Vault. How do I find that?