The cost of building a mobile game app can vary widely depending on several factors such as the complexity of the game, the platform(s) it will be developed for, the number of features, the development team's location, and their level of expertise.
For simple 2D games, the cost can range from $10,000 to $50,000. However, for more complex 3D games, the cost can easily exceed $100,000 or even $500,000.
the cost of building a mobile game app can vary widely based on the project's scope and requirements. It's important to work with an experienced development team to get an accurate estimate for the cost of developing your specific game.