There is monitoring software now on the market like TeenSafe and that can capture texts, typing, photos, and history – but it only really works on Android devices. Apple has closed its doors to apps that monitor or share information received or sent by an iPhone. TeenSafe and other products have limited capabilities in the iOS environment, but typically require a complicated and often frustrating setup. And your child will be well aware that it's installed, since it clearly states on the bottom of your kid's iPhone's lock screen "THIS PHONE IS MANAGED BY "TEENSAFE INC." This will alter your child's behavior, forcing him or her to be more covert. You may never know what's going on.

I can count a thousand reasons why you should be monitoring your child's activity on their portable devices, starting with:

Exposure to pornography
Terrorist recruiting
Cyberbullying
Criminal activities
Drug dealing or purchasing
Cheating on schoolwork
Ditching school