Dark mode for ZenFone 2 Contacts app?

While some models of ZenFone need to install ASUS Contacts Theme – Dark to have the dark mode in the Contacts app, ZenFone 2 has this option built-in.

To switch the Contacts and Dialer to dark mode:

1. Open the Contacts app.
2. Tap the Menu button > Settings > Personalized settings
3.  Check the box next to Dark mode.