We are creating a news app, which provides short news. For this, we have used google's material cards which are scroll-able and tabs for categories. Our main concern is how to track these cards properly? since everything gets tracked if you scroll too fast.
Take a look to the image below and imagine articles are in cards layout:
Now, after seeing this page, did you read all articles and news in it? Or just a snippet of the article with maybe a photo?
Translating to your app, what you have is called a coplanar
A card collection is coplanar, or a layout of cards on the same plane.
So it's easy to see a coplanar is just a container, and you want to track cards, not coplanars
Well, there goes your answer: you track the container or coplanar for all cards like in any web page and you track cards only if the user chose to click on any of them, therefore effectively going to a new tracked page or an expanded view of the card (in this case, you can track the expand button)