Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack

team size
10
country
Germany
Client Name
Portazon GmbH
Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack
Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stackSmart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack
Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack

Online marketplace for local businesses

Portazon connects Trier residents with local retailers and restaurants via a convenient marketplace. This marketplace allows customers to place orders for food and product delivery at any partner retailer or restaurant. Partner businesses retain full control over pricing, shipping fees and modalities, and listed products.

Besides the traditional range of marketplace features, we implemented a combined order feature. It allows customers to bundle orders from multiple vendors into a single delivery.

The marketplace experience was a proven success among customers. The feature had a higher-than-average engagement rate of 86%.

Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack

Convenient payment methods

We integrated both apps with a credit card payment processor, as well as Google Pay on Android devices and Apple Pay on their iOS counterparts. We thoroughly tested these integrations to ensure the payment experience remains frictionless, smooth, and error-free.

Our efforts proved rewarding. The payment process was the most intuitive user flow across the app, and our testers' task success rate reached 96%.

Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack

Utility contract management

As a principal backer of Portazon, SWT wanted the app to provide comprehensive contract management features to locals. We helped the company turn its ideas into a fully functional SWT customer center for residents of Trier and the region who use SWT’s gas, electricity, and water services.

With all invoices, discounts, readings, and data adjustments centralized in the app, local residents could finally manage their utility contracts on the go. Thanks to our iterative interface refinements, the customer center saw an engagement rate of 84%.

Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack

Ticket access and management

To make the transition to smart city services smoother, Portazon aimed to facilitate access to and use of common public transport tickets via its mobile app. To that end, we integrated support for both the Germany Semester Ticket for students and the €49 Germany Ticket.

Thanks to our extensive testing, adding a ticket to Portazon became a matter of several simple taps. Users can also easily pay for a ticket without leaving the app thanks to our payment integrations.

Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack

Parking and EV charging access and payment

Portazon was also conceived as a convenient way to find EV charging stations and municipal parking lots and pay for their services. To make it a reality, we integrated an intuitive map view so that users could easily find the needed charging station or parking lot. Payment integrations, in turn, allow users to pay for parking and charging within the app.

Early user feedback praised a streamlined payment experience and convenient location lookup. Our performance-optimized development approach and thorough testing made user flows faster, eliminating the risk of unnecessary lag or unexpected errors.

Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack

City services at a glance

Besides parking lot and charging station lookup, we also added a map view for all city services. Those included free Wi-Fi hotspots, ATMs, carsharing stops, and public transport information (e.g., timetables). Users can browse the map itself or quickly find what they need using a search bar and detailed filters.

Thanks to a fast search and intuitive map view, finding the right city service took early users mere seconds, with the task success rate exceeding 91% on both platforms.

Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack
Smart city mobile app: Speeding up time-to-market by 37% with a cross-platform tech stack
Smart City Mobile App Development | Darly Solutions Portfolio
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