Application

[ujjal123]

Samsung should introduce dual app system...

[Fast_n_Curious]

Its already there.

[ujjal123]

For all apps

[umesh30]

It's already available as secure folder... I attached screenshot for your reference.. Apps with small blue folder icon is the dual app while without small blue folder icon is the main apps

[sarnandu]

for whatsapp it is there and you can create secure folder also for all apps