In-app purchases for multiple accounts with a single Apple ID is not supported.
Suppose you have two free Awesome Screenshot accounts, A and B. You purchase a subscription for A in the app, and then you switch to account B and want to purchase a subscription for B. Since A's subscription is active, you cannot purchase a subscription for B with the same Apple ID.
If you need to access Premium features and switch between A and B in the app, please upgrade B on the website.
Just follow the steps below.
Sign in to Awesome Screenshot & Recorder account B via our official site
Click Pricing at the upper right corner of "my items" page
Choose a plan that fits you most and click "Upgrade" to make a purchase. You can pay via card or PayPal
Once the payment is done, your account will become Premium. You can log in to Awesome Screenshot & Recorder app with account B and enjoy the Premium privileges
If you still have any payment issues, please feel free to contact us at email@example.com.