If you're concerned about the amount of information Facebook has on you, there are two ways you can limit the data that the site collects about you. You can either use the privacy settings within the app, or you can download a third-party app that will allow you to do so.
Within the Facebook app itself, there is a dedicated section for Privacy Shortcuts. Here, you can review and adjust some of the key privacy settings that Facebook offers. For example, you can control who sees your posts and profile information, manage tags and tagging permissions, as well as control ad targeting preferences.
If you want even more control over your data, there are a number of third-party apps that offer similar features. Some popular ones include IFTTT (If This Then That) and Ghostery. These apps allow you to fine-tune your privacy settings and even block specific trackers from following you around online.