Yeah these apps are surprisingly technical under the hood. My buddy works in mobile dev and broke it down for me once - they run as background services using the OS's own scheduling, so they don't show up like a normal open app. Manual install is required (no remote magic), but after that it's basically invisible unless you dig into running processes. Ended up testing SpyBubble Cheating Spouse Tracker myself after a rough situation with an ex - their setup was the least confusing I'd tried and actually showed what was being logged in real time. Location pings, call logs, messages - all syncs to a private dashboard. Wild how seamless it is once running.