AI-powered mobile app leads the shift toward smarter energy management
E.ON HRVATSKA
We built an AI-powered mobile platform for energy management, positioning E.ON Hrvatska as an innovative, sustainable, and customer-focused leader.
SERVICES
PRODUCT STRATEGY
MOBILE DEVELOPMENT
WEB DEVELOPMENT
BACKEND DEVELOPMENT
DATA & AI
UX/UI DESIGN
USER TESTING
QUALITY ASSURANCE
PROJECT INFO
An energy management app that lost its spark
E.ON Hrvatska is the Croatian branch of one of Europe’s largest energy providers, supplying electricity and gas nationwide while supporting the green transition through solar solutions and EV charging.
As a young, fast-growing market player, they wanted their digital presence to reflect their commitment to innovation and customer care. But their mobile app told a different story.
Low app store ratings and a steady stream of customer support calls made one thing clear: the outdated experience didn’t match the energy of an ambitious, modern brand.
Powering growth, reducing customer service load
In 2025, E.ON Hrvatska partnered with Infinum to rebuild their mobile experience from scratch. The result is a modern platform that simplifies energy management for customers, enabling them to track gas and electricity consumption, submit meter readings, and manage their bills within a single, intuitive interface.
With a seamless user experience and self-service capabilities, the new app reduces pressure on E.ON’s customer support centre and solidifies their role as an innovative, sustainable, and customer-focused energy leader.
Bringing electricity and gas services together in one platform and introducing AI-powered meter reading, the app became the first solution of its kind on the Croatian market and raised the standard for utility apps.
RESULTS IN THE SPOTLIGHT
A measurable surge in performance
Shortly upon launch, App Store ratings more than doubled, a clear signal that customers were finally getting the experience they had been waiting for. The app is now onboarding around 60 new users daily, most of them entirely new customers.
Beyond perception, customer behavior shifted as well. All new app users have opted for e-billing, directly supporting E.ON Hrvatska’s sustainability agenda.
Users activated e-bill
100%
App users are new customers
70%
Daily new users
60
Aligning on vision, priorities, and feasibility
Before diving into design and code, we organized product and technical discovery workshops to align the product vision with business goals, user needs, and technical capabilities.
Product discovery
Together with E.ON, we analyzed competitors across European markets, defined key customer segments, and identified the features that would deliver the most value for users while supporting business goals.
Technical discovery
During technical discovery, we designed the system architecture and mapped integrations with E.ON’s internal systems to ensure the platform was scalable, reliable, and ready to support future growth.
“From day one, the Infinum team was exceptionally well prepared. They understood our expectations, had researched other suppliers, and were fully aware of developments on the European market. I was genuinely impressed; they sometimes knew more than I did at the start of the project. The communication with the entire team was excellent. Whenever we had a question, we received a clear and simple answer. I’m not an IT person and don’t understand many technical details, but everything was always explained in a way that was easy to grasp.”
CALL CENTRE AND SUPPORT GROUP LEAD,
E.ON HRVATSKA
From 0 to MVP in 5 months
The client’s deep understanding of their customers, combined with our expertise in building digital products, resulted in a highly efficient, collaborative environment. Working in agile iterations and aligned around clear priorities, the team delivered a high-impact MVP within a tight timeline.
Customer support
agent on call
Guided by insights from E.ON’s customer support team, we designed the app around the most common reasons customers reach out, from checking bill status to submitting meter readings. The result is a digital extension of customer support that replaces routine calls with instant, 24/7 access to essential information.
A refreshed visual identity and interactive visualizations bring the E.ON brand to life while keeping usability front and center.
Inclusive by design
The app is designed to make energy management easy for everyone, from young, tech-savvy users to the elderly with limited digital experience. The interface is intuitive and free of clutter, reducing cognitive load and simplifying decision-making. Clear hierarchy, consistent navigation, and help screens ensure that users always know what to do next.
No user left behind
Built according to the latest international digital accessibility standards, the app features enhanced contrast, landscape mode, scalable fonts, full screen reader compatibility, properly spaced buttons, and clearly labeled interface elements to ensure usability for people with disabilities.
Identify trends based on data
Users can monitor electricity and gas usage within a single app and compare monthly and yearly consumption to identify trends and manage costs more effectively.
In-app meter readings
No more unnecessary customer care calls. Meter readings can now be submitted directly through the app. With the option to add multiple meters, users can manage all their properties in a single place.
Digital invoicing
Invoices, payment status, and due dates are easy to track throughout the app. Downloadable invoices with barcodes enable fast and hassle-free online payments.
Encouraging eco-friendly habits
The app supports E.ON’s sustainability goals by encouraging e-bill activation providing educational content about energy efficiency and sustainable household solutions.
Users can customize notification preferences and receive reminders when it’s time to submit meter readings, when a new bill is issued, or when a payment due date is approaching.
AI-POWERED CONVENIENCE
Instead of manually reading a gas or electricity meter, often located in a hard-to-reach place, users can simply take a photo. Large Language Model (LLM) extracts the reading and pre-fills the form for quick in-app submission.
Using the same technology, users can scan their ID card and automatically update their personal information.
“Whenever we brought an idea to the table, even if we weren’t sure how to implement it, Infinum’s response was never ‘we can’t.’ It was always, ‘we’ll check,’ and within days, they came back with a solution. The AI meter reading feature is a perfect example of that proactive and innovative approach.”
CALL CENTRE AND SUPPORT GROUP LEAD,
E.ON HRVATSKA
Command center for the E.ON team
Alongside the mobile app, we developed a web portal that gives the E.ON team full oversight of app user activity and requests, as well as the ability to update in-app content independently.
Single codebase for any OS
Built with Flutter, the app runs on a single codebase for both iOS and Android. Choosing this cross-development framework sped up development and enabled us to deliver a pixel-perfect interface with smooth animations across platforms.
Protecting E.ON
systems from unnecessary load
What feels simple to users is powered by serious engineering behind the scenes. Instead of connecting the mobile app directly to E.ON’s internal systems, we built a backend layer with .NET, using the backend-for-frontend (BFF) architecture pattern.
Acting as a secure intermediary, this layer ensures the app retrieves only relevant data while protecting E.ON’s systems from unnecessary load. The result is a fast, secure, and scalable platform built to grow with the business.
The future looks bright
The collaboration between Infinum and E.ON continues with an ambitious roadmap ahead. The next phase will transform the app from a self-service tool into a full sales and engagement platform.
Customers will soon be able to message E.ON and pay bills directly in the app, receive estimated bill calculations, request refunds, and switch suppliers in just a few clicks using AI-powered contract scanning. Future releases will also expand access to smaller B2B customers and introduce real-time solar project tracking.
