The "App Privacy" section of the App Store shows what data is collected – "data linked to you," and "data not linked to you":
https://apps.apple.com/us/app/gospel-li ... d598329798
Google and Adobe services allow employees who support Gospel Library to see analytics (usage trends) and diagnostic information (crash logs), both of which fall into the "data not linked to you" category. Analytics are important for making prioritization decisions, for example, which features should be added or removed from the app, how features should be adjusted, what languages should be provided, etc. to make the app as useful as possible for members around the world, who use the app in different ways. Diagnostic information allows developers to debug and fix issues that cause the app to crash or get into a bad state.