iOS 12 and Newer
These are devices bought in 2018 or newer, or for devices older than 2018 that have had the operating system upgraded to iOS 12 or newer.
With Apple’s Screen Time, you are able set restrictions and add parental controls to block/limit specific apps and features, as well as restrict the settings for explicit content, purchases and downloads, and privacy.
This blog post walks through the options that are available as well how to implement them.
On the Apple site it also describes some of the options.
iOS 11 and Older
Typically these are devices bought in 2017 or before, unless the operating system has been upgraded to iOS 12 or newer.
These older versions do not have Apple’s Screen Time like the newer versions above, however, similar functionality (not as advanced) is included in Apple’s Restrictions.
This blog post walks through the options that are available as well how to implement them.
For All Phones
Qustodio also has a Q & A webpage that is helpful with some good questions and answers with regards to using its app on your Apple device.
Siouxland Modern Media committee setup a page on 4 steps to secure your phone, which is helpful to ensure your Apple or Android phones are protected.