TemplateToaster supports all the 5 breakpoints of Bootstrap v4, we just categorize these breakpoints as follows:
In "Large and Extra Large Devices" the responsive grid system, layout and styles of Desktop View are effective.
In "Medium Size Devices" the responsive grid system, layout and styles of Tablet View are effective.
In "Small and Extra Small Devices" the responsive grid system, layout and styles of Mobile View are effective.