I would love to upgrade BUT

Your auto renewal is a big turn off. I'm old and don't need apps taking money after I die.

You can buy a subscription and cancel it afterwards. It will keep the purchased subscription until the end of the period, and then it won't renew.

Ghostmaker
Thank you for using Ventusky. Each subscription runs for one year, and you can cancel the renewal up to 24 hours before the next term begins. Our goal is not to charge people for something they don’t use. However, since we have to deliver fresh data every single day, one-time payments simply wouldn’t make sense.