Download Gomoku on iPhone, it must be ad-free.

I will teach you a way to avoid advertising

Download a backgammon game, then go to the phone settings - cellular network - use wireless LAN and cellular mobile applications - find the backgammon game, Click in and select Close.

Then the app will not skip ads. This method is applicable to any app

ps: Advertising is the basic income for daily maintenance of free game apps, so free apps are With ads