OKKO's Smart B2B platform was desktop-only, so Linkup ST redesigned it as a mobile app around three distinct user types - Cards Only, Coupons Only, and Mixed Type - simplifying limit settings, adding proactive coupon-expiry alerts, and streamlining payments.
OKKO is one of the largest fuel retailers in Ukraine, operating across B2B and B2C at national scale and covering 18–19% of the country's retail fuel market. Its Smart B2B platform is a fuel resource management ecosystem used by Ukrainian businesses to control expenses, manage fuel cards, and handle vouchers.
The platform existed only on desktop, making it unusable in dynamic, on-the-go environments where managers and drivers actually operate.
This is why the Linkup ST team was tasked with more than just building a mobile app; they had to essentially reinvent the user experience while keeping the complex business logic under the hood. This case study explores how deep analysis and a focus on real user needs allowed a bulky system to be transformed into a convenient mobile tool.
Analysis revealed several critical pain points faced by clients, and each one shaped a specific part of the redesign — from limit settings to payments to day-to-day navigation.
To find the right solutions, the team segmented users into three distinct groups, as their interaction scenarios differed cardinally: "Cards Only" users who use the fuel card like a wallet, "Coupons Only" users who work based on pre-purchasing specific volumes of fuel, and "Mixed Type" users — the most complex group, needing to see the full picture simultaneously.
This approach allowed the raw technical specs to be converted into a viable app architecture. Read more in our related case studies.

MD Rijvee Ahmmed
Founder & CEO, Rising Station