Andriod mobile ke har app me security kaise lagaye

Andriod mobile ke har app per security Kaise lagate hai our kyu esliye lagate hai kyuki na to hamara koi WhatsApp hack kar payega our na to Facebook Etna hi nahi our hamara mobile hang hone se bhi bachega eske liye aap sabse pahle apne app store me jaye our usme likhe folder lock our search kar de Aa jayega usko download kar ke enstaal kar de