You can overview the subscriptions you have and manage your billing within the Sintra App!
To do so, you will need to:
Go to account's settings by clicking on the gear icon in the bottom left corner:
Then, scroll down until you reach "Billing details" section:
Overviewing your subscriptions
Just under "Billing details" you will find your subscription plans listed out, each with a "Plan" label. This will provide an overview of your subscription plans and their statuses.
Managing your billing
Using the "Manage billing" button under the "Billing details" section, you'll be able to:
Modify billing details
Update payment information
Cancel your subscription