Random Rant: I feel like reddit died after they banned all the "unmoderated" communities. All the posts became sanitized. Now reddit is adding AI and streaks and NFTs to keep people on a platform that has no more content.
If an app can scrape phone info without prompting for extra permissions, you can bet the app dev is scraping that data and storing it alongside session data for security purposes.
Web browsers are much more sandboxed. Still plenty of ways to fingerprint tho