Zaks Trezor is a free loyalty application designed for Android users, aimed at enhancing the shopping experience by offering rewards and discounts. Users earn one point for every €20 spent, with each point equivalent to €1. This system allows customers to accumulate value through their purchases, making loyalty more rewarding.

The app provides an intuitive interface for tracking points, purchases, and coupons, which can be redeemed at Zaks locations across Croatia and on their webshop. Users can also receive notifications, news, and insights about the brand's jewelry, enriching their shopping experience. To utilize the app for online purchases, users must enter coupon codes manually if not logged in.