Sweden Energy Systems Mobile Applications and Controller Software

About the client

The client is a Sweden-based global leader in energy-efficient ventilation and heating systems, employing over 17,000 people and serving cold-climate markets with advanced indoor comfort solutions.

The Story

The client required a complete software upgrade and QA validation for their ventilation systems to ensure reliability, seamless hardware–software integration, and improved user experience. They engaged FiftyFive Technologies to design mobile applications, strengthen system connectivity, and provide end-to-end functional testing. A dedicated engineering team was deployed, covering mobile development, embedded integration, and QA.

Challenges

• > Inconsistent scheduling and data mismatches in trend view.

• > Alarm failures under device error conditions.

• > Cross-device UI discrepancies in plant view.

• > Notes not syncing across user sessions.

• > Connectivity issues over TCP, direct, and cloud modes.

• > Role-based access control assigning incorrect permissions.

• > Requirement for cost-efficient cross-platform apps using a single code base.

The Solution

• > Built Android and iOS apps using Kotlin, Swift, Flutter (GetX) with clean architecture and shared repository.

• > Developed core controller features with C#, integrating seamlessly with existing hardware.

• > Conducted extensive QA using Scope tools, automated test scripts, and real-time validation.

• > Verified scheduling, alarms, trend view, and notes syncing under multiple scenarios.

• > Calibrated airflow and temperature sensors for accurate monitoring.

• > Validated connectivity across TCP, direct, and cloud environments.

• > Implemented secure role-based access control for multi-level user permissions.

• > Established CI/CD pipelines for faster releases and reduced defects.

The Outcome

The project delivered a production-ready ventilation system with 99.8% functional accuracy across Android, iOS, and HMI platforms. Connectivity stability improved by 65%, defect rates dropped by 40%, and synchronization issues were fully eliminated. Time-to-market accelerated by 3 months, enabling the client to launch ahead of competitors. The enhanced UI/UX increased end-user adoption by 30%, while long-term maintenance costs were reduced by 25%. These results strengthened the client’s market position and demonstrated FiftyFive’s ability to deliver scalable, high-quality engineering solutions.