In Airport City, you can get a paid subscription that will give you additional benefits and bonuses for a more comfortable game.
  
There are two types of subscription, Silver, and Gold. Such a subscription can be issued for a period of 1, 3 or 6 months.
  
The subscription is bought inside the game. To do this, go to the Subscription tab, which can be found in the Bank.
  
Subscriptions purchased through Google Play and the App Store will be renewed automatically. If you subscribed on another platform, your subscription will not be automatically renewed.