IPhone spy and how it works?

I'm concerned my teenage daughter is hanging around, and possibly dating, a 20-year-old that has already been in and out of prison. I won't go into details, but before confronting her I want to make sure it's true. Does anyone know how well iPhone spies work, and how traceable they are? She's pretty good with gadgets, so I'm worried she might discover its existence. Does anyone know how these things work, and if it's possible for her to trace or find it?

Mobile Spy is recommended.
Key Features:

Records text messages
Track call information
Monitor social media
Track GPS location
Block apps
Get SMS commands for phone activities
Record Facebook/Gmail/WhatsApp/Youtube activities
Run in stealth mode and view Logs online.
View mobile live screen remotely
Record all Photos/Videos taken

Make sure you check your local laws before you install the Employee app onto your office device.

Check it out here:
http://www.spy-mobile-phone.com

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