When i open an app an ad pops up and says. App of the day : Game Of War. How can i remove that?

[AC Question]

It doesnt matter what i open it just annoys me especially when using whatsapp. Anybody know how to remove it?

 

[B. Diddy]

Welcome to Android Central! Something you installed carried adware with it. You may have to uninstall apps one by one until that behavior goes away. Alternatively, you could do a factory reset, then reinstall apps one by one until the problem recurs--then you'll know which app is responsible.