City Rating

City rating is a core aspect of the game that utilises Research Tools (RT) and Private Donations(PD) to give you a flat boost to power production. It is used as a method of detecting progress in several areas, such as serving as an endpoint for most Challenges or being used to grant Stardust via the Time Transfer mechanic.

City Rating bar shows energy requirement to get to next CR level, and your progress on it. The Timer on the right shows time before current City Rating resets.Each time you get to next CR level, you get 5 more seconds on the timer (You can get more with upgrades). On the top you can see your Current CR and '''Lab Max CR. On the bottom there are Lab Max CR, Vortex Max CR and CR Bonus to production.'''

The important ones are Current CR, Vortex Max CR and CR Bonus. First one shows your current progress on CR, second is your maximum CR level reached in this vortex. Your CR Bonus depends on your Vortex Max CR, and the formula is

$$\frac{CR \times RT \times PD}{100}$$ RT and PD are Research Tools and Private Donations Lab upgrades bonuses.

For example, with 50 Max CR and 1 level of each mentioned upgrades you get

$$\frac{50 * 2 * 40}{100} = $$ 40% bonus to your production.

Global City Rating (GCR) - total amount of CR you've earned throughout your vortices. After each vortex you are prompted to assign those points to Vortex Lab upgrades.

The amount of energy required to jump from one CR to the next is dictated by this formula:

$$\text{Energy} = 10 \times \frac{1.19^{CR}}{2^{V \times TI}}$$

Where V - number of times you vortexed, and TI - level of To Infinity upgrade