How to pay for Premium
The Premium screen in your dashboard has the price and a button. Pick monthly or yearly and press it.
What you can pay with
UPI AutoPay or a card. UPI AutoPay is a standing instruction you approve once in your own UPI app; each month's payment then goes through without you doing anything, and your app notifies you before it does.
No card is needed to start a free page, and nothing on the free page ever asks for one.
What happens after you pay
Your plan flips to Premium and everything on the list turns on. If it has not after a minute, reload the dashboard: the confirmation comes back from the payment provider and can take a few seconds.
Your charges
The Premium screen lists every charge with its date and amount, and a link out to the provider's own invoice for each.
If a renewal fails
You are told, and your plan stays Premium for a short grace period so a failed card does not take your domain down the same hour. Fix the payment method in your UPI app or with your bank and the next attempt goes through.
Moving from monthly to yearly
The Premium screen has the switch. It takes effect straight away: what is left of the month you have already paid for comes off the price, you are charged the balance, and the year runs from that day.
Moving from yearly to monthly
There is no switch for that one. A yearly plan runs to the end of the year you paid for, and you can cancel at any time. The monthly plan is there to subscribe to afterwards.