Do InApp subscription prices have to match prices on my web app?

My mobile app is a business app and is an "extension" of my web app. Both the web and the mobile apps require paid-subscription to unlock certain features.

I know that Apple wants all subscriptions in my mobile app to go through them and I am NOT allowed to provide a link to my web app which also allows users to subscribe.

I want to better understand if I can run a "Web Special" for users to subscribe through my web app? I still would NOT provide a link to my web app but I'd like to mention these specials in my mobile app so that users are aware of them.

Do InApp subscription prices have to match prices on my web app?
 
 
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