Change page from hardware

Greetings to all BLYNKANOS.
I would like to have several pages in the mobile APP and that when starting the APP would put by default any of the pages 1, 2 or 3, depending on a variable from 0 to 2.
Is this possible?
I know that there is the option:
Blynk.setProperty (vPin “page”, page_index). but I don’t know how to execute an action and be able to change by hardware the default screen.

Can anyone help me every time I open the blynk APP to load a page set to a stable variable from the hardware?