AT&T iPhone Parental Controls

2 kids with iPhones... Parent wants to setup controls. The two things I've seen are * [SL (SmartLimits)](https://www.att.com/shop/wireless/smartlimits.html) for AT&T * [PC (Parental Controls)](https://support.apple.com/en-us/HT201304) on the iPhone. Using SL would limit Time, Numbers, Data, etc from the phone itself... while the PC would limit access to stuff like porn and other bad sites within Safari. If I use PC do I still need to pay for SL? Does SL do web filtering (IE: XXX) now or does it still not block Safari? Are there any limitations to using these two together? Are there any other options worth noting? Or is it really limited these two options? **Edit:** As a clarification... Parent has 2 "tweens". Boy & Girl. Associated issues - XXX, "Sexting", up late, using during school hours, etc. They aren't "Technically minded" so trying to look into "simple" options. What I see available is SL and PC... but neither seems a silver bullet. Neither also seems to offer super-granular control (Which is, I guess, okay for non techies) nor all the options in one place (SL can't block Safari and PC doesn't seem to have hours of operations, that I can see). For example, one specific question is "How do I block Instagram after 10?". Personally, I would block data on the phone via SL - but that doesn't block WIFI access to those services if I'm not mistaken. So... my "edit" is more... how does one handle "Parental Controls" and are there any "all-in-one" options? If not, SL & PC it is... SL for texting/calling/cell-data during inopportune times... PC for more control of the iPhone and applications such as Safari - but not super-granular such as "Block Instagram after 10".