Stardust

Stardust is a new currency added with the Relics patch.

Stardust is used to unlock new relic and roll its stats. Each player start with only 400 Stardust, enough to buy one Relic and roll the stats two times. However there are different ways to obtain Stardust:
 * Checking-in every day.
 * Completing special Milestones.
 * Event coupons.
 * From real cash shop.

Check-in
You can get rewards when Checking-in every day by clicking the Check-in button on the Relics menu.

When you Check-in consecutive days your streak will increase and you will get better rewards. At some points you will get extra Stardust.

If you miss one day the streak counter will be reset unless you have Goku. Also after reaching 100 consecutive Check-in and claiming the special reward your streak will be reset.

Milestones
Milestones are special Achievements that will give extra Stardust, this rewards can be claimed only one time:

Time played
Obtained by playing "x" days. This is the total time played since start.

Highest City Rating
Obtained by increasing the CR. This is the maximum CR reached in all vortex.

Challenges
Obtained by completing Challenges.

Vortex
Obtained by starting a new Vortex. V30 is the last Vortex that will give reward. Where n is the number of Vortex.

Cycles
Obtained by reaching "x" Global Cycles.

Global City Rating
Obtained by increasing the Global CR. This is the sum of all CR reached in every vortex.