If the mobile app freezes or shuts down immediately after opening, start with the basics: force-close it, clear the cache in your phone's app settings, then reopen. If that doesn't help, uninstall and reinstall the app — this fixes most crash issues tied to corrupted local data.
This usually points to a connection issue rather than a server problem. Check whether other sites open normally. If they do, try switching between Wi-Fi and mobile data. Sometimes the app gets stuck on a stale session — logging out and back in resets it.
Double-check your username, not your email — Reddit uses usernames for login. If you're sure the credentials are correct but still getting an error, request a password reset. Also check whether third-party login (Google, Apple) is causing a conflict if you originally signed up through one of those.
If your post or comment just spins and never goes through, the most likely cause is a weak or intermittent connection. Wait a few seconds before retrying — Reddit often registers the action even if the UI doesn't respond. Avoid tapping "Submit" multiple times, or you'll end up with duplicates.
Try rephrasing your query using fewer or simpler keywords. Reddit's search is sensitive to exact phrasing. If the search bar itself is unresponsive, a full app restart usually brings it back.