I subscribed for the pro version on the android application but I can't use it on my main account in a browser
I subscribed for the pro version on the android application but I can't use it on my main account in a browser, this is NOT ok. The subscription should be related to the account and not to where you are accessing your account, in other words, app, or browser, etc.
1st
ranked

When Mail Pro is purchased through the app, it’s tied to your Google Play or Apple ID (not your Yahoo ID). More details here: https://help.yahoo.com/kb/SLN15803.html