Can you tell if someone looked at your phone?

Ugh, isn't it just creepy to think someone might have been messing with your phone? I mean, my phone! It makes me shudder just thinking about it. Seriously, I'd be livid! I've got this app, GlassWire, and it tracks all the data my phone uses. Let me tell you, any little unexpected spike, and I'm like, "What the heck was that?!" My heart practically leaps out of my chest. Like, if I'm not even using any apps and it's showing data transferring… major red flag. Screaming spyware, right? I swear, I've become a total data usage hawk. Checking it constantly. It's probably a little obsessive, but honestly? I'd rather be obsessive than have some creep snooping through my private stuff. Remember that time Sarah found out her ex was tracking her location through an app he'd secretly installed? Totally chilling. That's the kind of nightmare I'm trying to avoid. So, yeah, a little bit of data paranoia? I can live with that. It's a small price to pay for peace of mind, you know?