How Can I block apps and websites?

You can block apps and websites on Rules page of your SecureTeen dashboard. If you want to block apps/websites permanently then you can do it by blocking apps' icons under APPS control settings and black-list URLs & categories for adult or unwanted website under WEB setting. 

However; if you want to block apps or websites during specific timings then you need to alert settings as per your desire for that time slot i.e. by clicking the “Advance Control” option under Time Control tab.