How could I check my subscription?

Navigate to your Profile and you would be able to see a subscription link as shown in the picture below.

Once you click on Subscription, you would be able to see all your plan details including characters used and total conversion characters left and your recent invoices.

You can also top-up characters or upgrade to a new plan from subscription page. Please note only upgrade to a new plan or top-up characters when your old characters are completely used up.