About One Onsite
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...
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
Version History - 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. 4.4.6 May 11 Enhanced non-reactive task configuration, including dropdowns and unique links for air filter tasks. Improved multi-asset replacement with bulk deactivation, duplicate prevention, and validation checks. Added plumbing PM workflows for water heater and general equipment inspection. Resolved work order issues: status update bug, step display, deferred access, and missed recurring rescheduling. Optimized photo compression and streamlined asset creation for improved efficiency. 4.4.5 Mar 23 Project WO schedule cards now support attachments . Optimized login experience; the app now remembers username and password. The default module on login has been enhanced. Bug fix and performance improvement. 4.4.4 Feb 10 add non-WO tasks; improve non-reactive WO tasks; enhance GPCA Workflow; bug fix and performance improvement. 4.4.3 12/16/2025 add sign in methods w/ Face ID & fingerprint; enhance PDF Viewing Experience; optimize workflows w/ asset replacement, client-specific questions, vendor badges; bug fix and performance improvements. 4.4.2 12/02/2025 optimize work order handling and access info; update GPCA checks and questions; enhance push notifications; AM calendar view now shows previous services; bug fixes and performance improvements. 4.4.1 10/24/2025 Onsite Increases Are Here! • Create, edit, and submit proposals in the app • Control which techs can create, submit, or see/edit pricing • Faster approvals, smoother jobs, happier customers Tap “More” to Learn How: Users with the Affiliate Manager role can set technician permissions in the Mobile Resources tab in the portal so you can specify who can create proposals, submit them, see pricing, and edit pricing. This upgrade eliminates delays and gives your technicians true quoting autonomy, allowing them to capture accurate costs and submit proposals instantly from the job site. The result: faster turnaround times, fewer missed opportunities, improved data quality, and a smoother experience for all of us without the back-and-forth of calls or portal logins. 4.4.0 09/19/2025 upgrade Asset module 4.3.22 07/31/2025 rollback to 4.3.18 4.3.21 07/17/2025 bug fixes and performance improvements. 4.3.20 07/15/2025 bug fixes and performance improvements. 4.3.19 07/11/2025 add previous services on calendar; add location info for interior & recurring WO; Log attachments and questions offline; improve workflow - check in/out, PM, line item; bug fixes and performance improvements. 4.3.18 05/10/2025 bug fixes and performance improvements. 4.3.17 04/25/2025 bug fixes and performance improvements. 4.3.16 04/04/2025 optimize notification, permissions & map functions; enhance service ratings; add feedback page; update FCI/ PM/ DC flow; update Asset HVAC flow; bug fixes and performance improvements. 4.3.15 04/01/2025 bug fixes and performance improvements. 4.3.14 01/24/2025 enhance global search function; optimize SIM modular; optimize photo taking experience; support PDF uploading; bug fixes and performance improvements. 4.3.13 01/15/2025 enhance RAWO photo, exterior service, fees and troubleshooting questions; improve Google direction request method; improve SIM modular - location list and weather alerts; enhance PM/DC workflow; bug fixes and performance improvements. 4.3.12 11/25/2024 bug fixes and performance improvements. 4.3.11 11/11/2024 enhance SIM module; miscellaneous features: undo trip, AM global search, PDF viewer, etc; bug fixes and performance improvements. 4.3.10 10/24/2024 bug fixes and performance improvements. 4.3.9 09/25/2024 enable SIM capacity; enable in-app file viewing capacity; improve sync notification; bug fixes and performance improvements. 4.3.8 09/18/2024 enhence Reactive WO flow; improve photo label experience; expand notification scope; other bug fix and performance improvement. 4.3.7 08/20/2024 optimize AM view; improve GPCA flow; enhance asset flow; fix RAD/ RAWO/ res code issue. 4.3.6 07/12/2024 add link to photo label; optimize in-app camera; enable signature capturing; optimize PVQ flow; optimize refrigerant tracking workflow. 4.3.5 06/18/2024
Previous Versions
Here you can find the changelog of One Onsite since it was posted on our website on 2023-06-27 15:55:49.
The latest version is 4.4.6 and it was updated on 2026-06-27 05:32:15. See below the changes in each version.
One Onsite version 4.4.6
Updated At: 2026-06-07
Changes: Version History - 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. 4.4.6 May 11 Enhanced non-reactive task configuration, including dropdowns and unique links for air filter tasks.
Improved multi-asset replacement with bulk deactivation, duplicate prevention, and validation checks.
Added plumbing PM workflows for water heater and general equipment inspection.
Resolved work order issues: status update bug, step display, deferred access, and missed recurring rescheduling.
Optimized photo compression and streamlined asset creation for improved efficiency. 4.4.5 Mar 23 Project WO schedule cards now support attachments .
Optimized login experience; the app now remembers username and password.
The default module on login has been enhanced.
Bug fix and performance improvement. 4.4.4 Feb 10 add non-WO tasks;
improve non-reactive WO tasks;
enhance GPCA Workflow;
bug fix and performance improvement. 4.4.3 12/16/2025 add sign in methods w/ Face ID & fingerprint;
enhance PDF Viewing Experience;
optimize workflows w/ asset replacement, client-specific questions, vendor badges;
bug fix and performance improvements. 4.4.2 12/02/2025 optimize work order handling and access info;
update GPCA checks and questions;
enhance push notifications;
AM calendar view now shows previous services;
bug fixes and performance improvements. 4.4.1 10/24/2025 Onsite Increases Are Here!
• Create, edit, and submit proposals in the app
• Control which techs can create, submit, or see/edit pricing
• Faster approvals, smoother jobs, happier customers
Tap “More” to Learn How:
Users with the Affiliate Manager role can set technician permissions in the Mobile Resources tab in the portal so you can specify who can create proposals, submit them, see pricing, and edit pricing.
This upgrade eliminates delays and gives your technicians true quoting autonomy, allowing them to capture accurate costs and submit proposals instantly from the job site. The result: faster turnaround times, fewer missed opportunities, improved data quality, and a smoother experience for all of us without the back-and-forth of calls or portal logins. 4.4.0 09/19/2025 upgrade Asset module 4.3.22 07/31/2025 rollback to 4.3.18 4.3.21 07/17/2025 bug fixes and performance improvements. 4.3.20 07/15/2025 bug fixes and performance improvements. 4.3.19 07/11/2025 add previous services on calendar;
add location info for interior & recurring WO;
Log attachments and questions offline;
improve workflow - check in/out, PM, line item;
bug fixes and performance improvements. 4.3.18 05/10/2025 bug fixes and performance improvements. 4.3.17 04/25/2025 bug fixes and performance improvements. 4.3.16 04/04/2025 optimize notification, permissions & map functions;
enhance service ratings;
add feedback page;
update FCI/ PM/ DC flow;
update Asset HVAC flow;
bug fixes and performance improvements. 4.3.15 04/01/2025 bug fixes and performance improvements. 4.3.14 01/24/2025 enhance global search function;
optimize SIM modular;
optimize photo taking experience;
support PDF uploading;
bug fixes and performance improvements. 4.3.13 01/15/2025 enhance RAWO photo, exterior service, fees and troubleshooting questions;
improve Google direction request method;
improve SIM modular - location list and weather alerts;
enhance PM/DC workflow;
bug fixes and performance improvements. 4.3.12 11/25/2024 bug fixes and performance improvements. 4.3.11 11/11/2024 enhance SIM module;
miscellaneous features: undo trip, AM global search, PDF viewer, etc;
bug fixes and performance improvements. 4.3.10 10/24/2024 bug fixes and performance improvements. 4.3.9 09/25/2024 enable SIM capacity;
enable in-app file viewing capacity;
improve sync notification;
bug fixes and performance improvements. 4.3.8 09/18/2024 enhence Reactive WO flow;
improve photo label experience;
expand notification scope;
other bug fix and performance improvement. 4.3.7 08/20/2024 optimize AM view;
improve GPCA flow;
enhance asset flow;
fix RAD/ RAWO/ res code issue. 4.3.6 07/12/2024 add link to photo label;
optimize in-app camera;
enable signature capturing;
optimize PVQ flow;
optimize refrigerant tracking workflow. 4.3.5 06/18/2024
One Onsite version 4.4.4
Updated At: 2026-02-10
Changes: Project WO schedule cards now support attachments .
Optimized login experience; the app now remembers username and password.
The default module on login has been enhanced.
Bug fix and performance improvement.
One Onsite version 4.4.0
Updated At: 2025-09-19
Changes: Sep 19, 2025
Version 4.4.0
Onsite Increases Are Here!
• Create, edit, and submit proposals in the app
• Control which techs can create, submit, or see/edit pricing
• Faster approvals, smoother jobs, happier customers
Tap “More” to Learn How:
Users with the Affiliate Manager role can set technician permissions in the Mobile Resources tab in the portal so you can specify who can create proposals, submit them, see pricing, and edit pricing.
This upgrade eliminates delays and gives your technicians true quoting autonomy, allowing them to capture accurate costs and submit proposals instantly from the job site. The result: faster turnaround times, fewer missed opportunities, improved data quality, and a smoother experience for all of us without the back-and-forth of calls or portal logins.
One Onsite version 4.3.22
Updated At: 2025-07-31
Changes: Jul 31, 2025
Version 4.3.22
upgrade Asset module
One Onsite version 4.3.18
Updated At: 2025-05-10
Changes: May 10, 2025
Version 4.3.18
add previous services on calendar;
add location info for interior & recurring WO;
Log attachments and questions offline;
improve workflow - check in/out, PM, line item;
bug fixes and performance improvements.
One Onsite version 4.3.17
Updated At: 2025-04-25
Changes: Apr 25, 2025
Version 4.3.17
bug fixes and performance improvements.
One Onsite version 4.3.16
Updated At: 2025-04-04
Changes: Apr 4, 2025
Version 4.3.16
bug fixes and performance improvements.
One Onsite version 4.3.15
Updated At: 2025-04-01
Changes: Apr 1, 2025
Version 4.3.15
optimize notification, permissions & map functions;
enhance service ratings;
add feedback page;
update FCI/ PM/ DC flow;
update Asset HVAC flow;
bug fixes and performance improvements.
One Onsite version 4.3.14
Updated At: 2025-01-24
Changes: Jan 24, 2025
Version 4.3.14
bug fixes and performance improvements.
One Onsite version 4.3.12
Updated At: 2024-11-25
Changes: Nov 25, 2024
Version 4.3.12
enhance RAWO photo, exterior service, fees and troubleshooting questions;
improve Google direction request method;
improve SIM modular - location list and weather alerts;
enhance PM/DC workflow;
bug fixes and performance improvements.
Disclaimer
Official App Store Link
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