Preferences
Settings
What the app may tell you, how it looks, which currency it quotes, and which language it speaks.
Notifications
Notifications are an app feature; the Android app receives them.
Appearance
The theme is always changeable here. The floating button is a shortcut to it on every page; turn it off and no page carries one.
Currency
Prices are shown in your selected currency. Google Play processes the final charge at checkout.
Language
What this app can do on your phone
Permissions are an Android matter: the app asks your phone for them, and the app lists every one of them on this page.