One Onsite by Lessen helps vendors and their technicians complete their facilities maintenance work orders successfully while collecting valuable information along the way.
With One Onsite, technicians can see the work they need to do for the day, read through relevant information around the issue, location and historical work done while effectively executing their work on-site with minimal disruption.
Some of the key features around this app include:
· Guided – With its seamless flow, simple language and focus on one task at a time, One Onsite is simple for the technicians to understand, and they require minimal training to use the app
· Informational – One Onsite provides information and photos around the work order, guides the technician to the location that they need to visit and provides relevant historical service information. It also helps the technicians understand what information needs to be provided to their back office based on the trade
· Efficient – One Onsite boasts of a vastly improved tech stack from its predecessor with better performance in offline and low connectivity areas, faster upload times and greater battery optimization
Latest Version
4.4.6Uploaded by
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Requires Android
Android 7.0+
Category
Free Business AppContent Rating
Everyone
Security Report
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Flag as inappropriateLast updated on May 11, 2026
- This release improves technician efficiency and app reliability with faster performance and more reliable notifications.
- Scheduling and task creation have been streamlined to support complex jobs.
- Technicians can now upload videos and use custom photo labels for better documentation.
- Plumbing and HVAC workflows are enhanced with smarter data entry and improved visual cues.
- Resident contact access has been improved for better on-site coordination, creating a smoother field experience.