Checking the status of paid subscription -- 2

I have ios app, where user can buy subscription.

But checking the status of paid subscription don't work properly.

I need programmer who can will add functionality that will check the status of subscription every time when user launch app.

If user cancel or subscription expired, this functional must switch off premium access in app when expiration date come.

App on Swift 4.2

iPad iPhone Mobile App Development Swift

Identifikační číslo projektu: #20001242

O projektu