I'd love to teach my parents, but I'm still challenged by giving them indicators to determine what should or shouldn't be installed. I actually find it hard to

I'd love to teach my parents, but I'm still challenged by giving them indicators to determine what should or shouldn't be installed. I actually find it hard to do myself, so maybe you can help. For example: My mom likes to play Sudoku. How should she go about to determine whether it's fine to install this app: https://play.google.com/store/apps/details?id=com.easybrain.sudoku.android https://play.google.com/store/apps/details?id=com.easybrain.... ? How can she (or I) determine whether this data is uploading data collected on her phone or doing some other sort of shenanigans?