Designer City: Idle Merge Game is a free offline idle town matching game available on the iPhone. In this game, you play as the mayor and your goal is to merge, build, and grow your small town into a successful mega money making city.

The gameplay is simple and addictive. By tapping on boxes, you can add new buildings to your city. To unlock new buildings, you need to swipe and match two of the same building. As you progress, you can discover and unlock new buildings in four different worlds: Designer City world, Designer City 2 world, Empire City world, and Empire City 2 world.

One of the standout features of this game is the ability to earn income for your city even when you're not playing. This adds an element of passive income and makes the game more engaging.

Unlike other idle merge games, Designer City: Idle Merge Game offers optional ads that are completely opt-in. You will only see ads if you choose to speed up an activity by watching an ad. This is a refreshing approach that allows players to enjoy the game without being bombarded by ads.

Overall, if you enjoy matching games and city-building simulations, Designer City: Idle Merge Game is a great choice. With its simple gameplay, multiple worlds to explore, and the ability to earn income offline, it offers an enjoyable and addictive experience. Please note that while the game is free to play, there are optional in-game items that require payment.