Do your research. For example, Apple takes its user's privacy very seriously. Review Apple's guidelines for their app store, which will inform you of their position on this topic. "The guiding principle of the App Store is simple--we want to provide a safe experience for users to get apps and a great opportunity for all developers to be successful."
They also state on their website, "What you work for should reflect what you stand for. For everything we create, we consider its impact -- on our customers, our colleagues, and our planet. The same innovation that goes into making our products goes into taking on issues we care about deeply, such as accessibility, equity, privacy, and the environment."