How to UPGRADE in Send it app?

i'm just trying to figure out how i can upgrade and send it app uh when i just go to my main user is no option to do it from here but when i go to app store it says that send it offers auto renew and subscription of 199 per week for premium sanded games one in empire for sending unlimited hints 12.99 for revealed messages these prices are for united states customers price in other countries my variety and actual charts might be convert to your local currency so there you have it so but i don't see it anywhere on the app or the website like if you know answers to this question just leave it in the comments below