PromoChip.bg is an Android app designed for the loyal customers of Helikon Bookstores who are members of the PromoChip program. With this app, you can easily keep track of your discounts, purchase history, and manage your user profile.

The app offers a user-friendly interface that makes it easy to navigate and find the information you need. You can view your current discounts and promotions, as well as your purchase history. The app also allows you to manage your user profile, including your personal information, contact details, and preferences.

Overall, PromoChip.bg is a useful tool for customers who want to stay up-to-date with their loyalty program benefits and manage their user profile in one place. It's a free app and can be downloaded from the Google Play Store.