White-label for banks
Embed micro-saving in crypto as a feature inside your banking app. We provide the engine, custody and compliance; you keep the full customer relationship.
Partners
Üstü Kalsın is not just a consumer app. It is infrastructure for banks, retailers and loyalty programmes.
Retail chain integration
The round-up goes straight into the customer's crypto account on every payment in your network. Increases loyalty at zero cost to you.
API for loyalty programmes
Convert collected points into BTC, ETH or USDC. Modern reward mechanic in three lines of code.
Technical docs · OpenAPI 3.1 spec
partnerships@ustukalsin.pl