Unfortunately, due to some technical complications we are having with implementing this functionality in the Apple’s App Store versions of the apps, you can only purchase the it Toolbox Premium subscription directly from our website through Lemon Squeezy (https://www.lemonsqueezy.com), a service that we use to offer this subscription.
We will definitely try our best to bring an ability to purchase the it Toolbox Premium subscription directly in the Apple’s App Store versions of the apps too.