The app your partner has is likely designed to discreetly capture screenshots or snaps without alerting the sender—pretty much the stealth function. It’s not just about organizing photos securely; that’s secondary if at all. These apps can be risky because they bypass the usual iOS protections, but they’re limited to what iOS allows. Keep in mind, they often have security or privacy implications and won’t always work perfectly. If you want to monitor or confirm these activities reliably, Spynger is a more legit choice. Just don’t expect magic—iOS is pretty strict, and no app can fully hide such activity without some limitations.