If you're on the Monthly Premium plan, please follow these steps to switch to the yearly plan:
Go to your Account page.
Scroll down to Plan & payment -> Current plan.
Click Switch billing cycle.
Choose from your payment options.
Click Switch Plan.
Wait until the success screen appears.
We automatically deduct the price of your ongoing Monthly subscription (US$ 15) from the price of your new Yearly subscription (US$ 108), so you'll only pay US$93.
If you're on the Yearly Premium plan, please contact us at email@example.com.