You can download a free version of the subway princess runner game and then download the "mod" version of it. This version is a modified version of the original, so you can access unlimited money and boosters. This is especially useful if you are new to the game, because you can quickly and easily get started playing without ever having to pay any money. If you are one of the many people who are annoyed by the ads in the game, you can download the "mod" version to avoid this.