No, they're not. Cookies are small files that store information about your online activity and can contain passwords and personalization information.  While many cookies are beneficial – such as those that help you stay logged into frequently used websites – other third-party cookies track your activity across different websites. This may include potentially private information such as search history and things you've clicked on. A cache, on the other hand, stores data files that your browser or app is expected to use frequently. This can speed up the performance of your phone by not needing to repeatedly download the same data over and over again.