One Onsite

One Onsite

One Onsite by Lessen

98 ratings
26 reviews
Free

Details

  • Released
  • Updated
  • September 6, 2022
  • September 22, 2026

Features

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About

This app assists facilities maintenance technicians in completing work orders efficiently. It provides detailed information, guides users to locations, and streamlines data collection for back-office reporting. The application is designed for ease of use with minimal training required.

✓View daily work orders
✓Access issue and location details
✓Review historical service information
✓Guided task completion flow
✓Offline and low-connectivity performance
✓Faster data upload
✓Battery optimization
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What's New in One Onsite

4.4.9

September 22, 2026

• Improved work order check-in and ProCare workflows. • View customer WO details, special instructions, and attachments. • More flexible photo label selection during capture. • Added “Needs Assistance” for faster support escalation. • Improved scheduling, service history, notifications, and media uploads. • Fixed several issues with navigation, messaging, photo capture, and work order execution.

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User reviews

Horrible app

All these SMS apps have sucked and are incredibly cumbersome to use. By the way you do not need access to my microphone and you do not need access to my camera in order to complete the paperwork. Very invasive to privacy. You guys really need to have one of the Field people who actually use the app give direction on its development instead of people who live in an office and think they know how the workflow should go. It’s not how it works in the field
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Service provider

In my opinion, this is a poorly designed app that did not take the actual technicians into consideration when designing the app. Example: NTE while on site does not actually exist. We are simply Service technicians and are not app designers. Way too hard to navigate

It never let me upload pictures

Doesn’t allow me to add pictures

Vendor Review

As a vendor this app is absolutely amazing. Lessen is head and shoulders above its competitors. Proud to be allied with them.

No error indication

Very hard to use

Developer apps

FAQ

What does the One Onsite app do?

One Onsite is designed to help facilities maintenance vendors and their technicians successfully complete work orders. It provides technicians with a clear view of their daily tasks, relevant information about each issue, and guides them to the correct location. The app also facilitates the collection of necessary data for back-office reporting.

What are the key features of One Onsite?

Key features include a guided, task-focused workflow that requires minimal training, access to detailed work order information and historical service data, location guidance, and improved performance in offline or low-connectivity areas. It also offers faster upload times and better battery optimization.

Is One Onsite free to use?

Based on the provided information, the application is available for free. There are no mentions of subscription fees, in-app purchases, or advertisements, suggesting it is a complimentary tool for its intended users.

Who is the target audience for One Onsite?

The app is specifically designed for technicians and vendors working in facilities maintenance. It aims to streamline their on-site operations, from understanding their daily tasks to accurately reporting on completed work, making it ideal for mobile workforces in this sector.