Customize or make your mobile phone
navigation bar more beautiful and good, using
Navbar app. It allows or enables any Android
users to customize the navigation bar of his or
her phone as the name implies.
Do you remember Xposed installer that allows
you to change your network signal bar, battery
icon and others by rooting your phone but this
navbar can be used without rooting your
phone but only based on one work - navigation
customizing app.
So if you wish to customize your navigation
bar on your mobile phone, you can only do
that by using this Navbar App.

Read more - www.ballowap.com.ng/2017/02/how-to-customize-your-mobile-phone.html?m=1

You can easily change navigation bar icon on android without root, here's how.