For your paid apps, you can enable discounts and coupon codes through Seller Office in order to promote your paid apps outside the Galaxy Apps store. Your customers benefit when they download your paid apps.
Paid App Download Discounts
For your paid apps that are being distributed, you can set one or more price discounts for your customers to download your app. You can set a discount percentage to apply to one or more countries to which your app is being distributed. You can also set a lower price for individual distribution countries. For each distribution country where users can pay by phone bill, you can choose whether or not to apply a discount to the phone bill price. For all types of discount, you can specify the time period in which your discount applies.
For more details, see the Apply and Manage Paid App Discounts section.
Paid Android App Download Coupon Codes
For your paid Android apps that are being distributed, you can generate and issue coupon codes to your potential customers that enable them to download your app for free. For each paid app that does not after a current discount price applied, you can generate up to 1000 unique codes and specify the maximum that can be redeemed by users in one more of the app's distribution countries. You can send a code to a customer in any way you choose. For example, you could send codes free of charge, for a lower price than your app's full download price, or as part of a paid-for promotional package.
Note: You must manage your issuing of coupon codes to your customers.
You can enable coupon code redemption starting at any future date you specify, and ending up to 28 days later. While coupon code redemption is valid, your customers enter their code during your app's purchase/download transaction. Each coupon code can be redeemed only one time.
For more details, see the Generate and Manage Paid Android App Coupons section.