Hello Storagefiend,
Thanks for reaching out to Apple Support Communities. We see you have some questions about subscriptions with content in the App Store, and we'd like to help. The applications that show "Get" are free. However, there could sometimes be subscription content that go with those, which is why you see that cost when you sign up/download. You may find more information about this here: Download apps and games on your iPhone or iPad - Apple Support
In the App Store, if an app has a Get button instead of a price, the app is free. You won't be charged for downloading a free app. Some free apps offer in-app purchases and subscriptions that you can buy. Subscriptions and in-app purchases give you access to more features, content, and more.
Let us know if this helps.
Regards.