How do I download secureteen on my childs phone without her knowing that

SecureTeen is the parental control app, which helps parents to manage web surfing and control all the mobile phone activities of their kids. SecureTeen app is designed to effectively block dangerous games and apps, to make sure your child stays safe online. https://www.myfonemate.com/parental-control/secureteen-parental-control.html

Secureteen is past-gen. For now I use geozilla app. It is a special program designed for use on cell phone devices. The phone locator program helps to track a device connected to the account so that a parent can monitor a child location or the location of a loved one who made need special monitoring and care.
It is capable of controlling and adjusting the accuracy of identifiable locations as well as the frequency of tracking to ensure the most accurate results possible.
If a person is being tracked with the phone locator program deviates from a planned route at any time or from a regular route home, the parent is immediately notified of this deviation.
Parents are allowed to monitor the speed of movement and the speed limits of teen drivers as well this empowers the parent to become an even stronger disciplinarian and an excellent teacher and guide for a child who may need a bit of monitoring to stay on track.
I always check on my children, are they at school and if everything's ok with them.

How is your carrier ?
Sprint has a family locator app, that can be set up without any notifications.