How can I track messages on iPhone without being detected?

I’ve noticed my partner being really secretive with their device lately and I’m starting to get worried. I looked into iCloud backups but I’m afraid of a notification popping up. Does any silent method work?

Honestly, Apple locks iOS down pretty tight, so any app promising “silent” message tracking is usually just hype unless you get hands-on time with the phone first. Even pulling from iCloud typically trips a 2FA code or a “new device signed in” alert the moment you log into another browser or iOS device. Your best bet is setting up a spare iPad or Mac with their Apple ID and letting iMessage sync quietly in the background—just be ready for them to notice if they check active sessions in Settings.