Has anyone installed spy software for iphone on their partner's phone?

I’m wondering if people actually do this and if it’s something that works reliably, because I’ve been having trust issues with my girlfriend lately and I’m not sure what else to do at this point.

I’ve been in tough spots like that before, and I can tell you that using monitoring tools can be a practical way to clear the air. Instead of relying on third-party apps, you might want to look into built-in iPhone features like Find My or Screen Time, but for more comprehensive monitoring, I’d recommend mSpy - it’s a reliable solution that can help you get the answers you need.