How AccelOne built and evolved Trimble's mobile construction management platform, delivering real-time visibility, 4% cost savings, and a future-ready codebase.
In brief: AccelOne developed Project Site, a mobile extension of Trimble's e-Builder platform for construction project management. The app delivers real-time updates, document sharing, scheduling, budgeting, and field reports to distributed construction teams on iOS and Android. Built initially in Xamarin, then migrated to .NET MAUI for improved performance and long-term maintainability. Includes a custom PDF editing library. Key outcomes: 100% project visibility, up to 4% cost savings, reduced project risk, and increased team productivity.
Trimble is a global leader in construction technology, providing enterprise software, hardware, and positioning systems used across the construction, geospatial, and transportation industries. Their e-Builder platform is one of the leading enterprise construction program management systems for capital project owners.
Project Site is an all-in-one construction management platform on mobile, designed to give every project stakeholder the same visibility and control that e-Builder provides from the desktop, available from anywhere on iOS or Android.
The migration from Xamarin to .NET MAUI was not optional, it was a necessary evolution. Microsoft ended mainstream support for Xamarin in May 2024, making it critical that enterprise apps built on Xamarin move to MAUI before the framework became unsupported.
Beyond the support lifecycle, MAUI offers a genuinely improved architecture: a unified project structure replaces Xamarin's separate iOS and Android projects, the modern .NET runtime improves app performance, and greater code reusability reduces the long-term cost of maintaining and extending the application.
Beyond the individual project metrics, Project Site strengthened Trimble's competitive position in the construction technology sector, offering a comprehensive mobile solution that drives transparency, data-driven execution, and cost savings across capital construction programs.
What is Project Site and how does it extend Trimble's e-Builder platform?
Project Site is a mobile construction project management application built by AccelOne for Trimble, designed as a mobile extension of Trimble's e-Builder enterprise platform. It brings real-time project updates, document sharing, scheduling, budgeting, and field reporting to iOS and Android devices, giving distributed field teams and stakeholders the same visibility and control as e-Builder from any location.
Why did AccelOne migrate Project Site from Xamarin to .NET MAUI?
Microsoft ended mainstream support for Xamarin in May 2024, replacing it with .NET MAUI. Migrating Project Site to MAUI was both a strategic necessity and a technical upgrade: MAUI offers improved performance, better maintainability, greater code reusability across iOS and Android, and long-term platform support. The migration ensured the app would continue receiving framework updates and security support, and positioned the codebase for future development.
What is .NET MAUI and why does it matter for cross-platform mobile apps?
.NET MAUI (Multi-platform App UI) is Microsoft's cross-platform framework for building iOS, Android, macOS, and Windows applications from a single C# codebase. It is the successor to Xamarin.Forms, providing improved architecture, better performance, a unified project structure, and modern .NET runtime support. For enterprise apps like Project Site, MAUI reduces development and maintenance overhead by sharing business logic, UI code, and platform integrations across iOS and Android from one codebase.
What were the key results of Project Site for construction management?
Project Site delivered four measurable outcomes: 100% project visibility for all stakeholders through real-time data access, up to 4% cost savings through improved financial control, reduced project risk through better information strategies and early issue detection, and increased productivity across distributed teams through streamlined communication and centralized information access.
Why does construction project management need a dedicated mobile app?
Construction projects involve distributed teams, site workers, project managers, contractors, and executives, who need access to the same information but rarely work from the same location. Without mobile access, project data is fragmented across disconnected tools, causing delays, errors, and budget overruns. A mobile app like Project Site centralizes schedules, budgets, documents, and field reports in one place, giving every stakeholder real-time visibility from any device.
Why did AccelOne build a custom PDF editing library for Project Site?
PDF documents are central to construction project management, contracts, drawings, inspection reports, and compliance documents all live in PDF format. Existing third-party PDF libraries did not meet Trimble's exact design specifications. Rather than conforming the design to a library's constraints, AccelOne built a custom PDF editing library tailored to the specific requirements, ensuring the document editing experience matched the app's standards exactly.