Chrome offers many personalization options, making it one of the best browsers on Android phones ... OLED and AMOLED screens.

For people who want a different theme for each chat. Open the individual chat and click the three dots (on Android)/Chat name at the top (iOS), then click Chat Theme to make the change.

Go to Settings by tapping the cogwheel icon on the top right corner of the app’s bottom panel on iPhone, tapping the three dots on the top right corner and selecting Settings on WhatsApp’s Android app ...