OSOI: Field & Office Teams
Tasks, chat & time tracking
Free
New: your time tracker works across your devices, in real time. Start on your phone, finish on your desktop, or however you like.
OSOI keeps your office and field teams on the same page. Projects, tasks, chat, documents, notes, and time tracking come together in one mobile-first app, so information stays with the work and the people it belongs to.
Built for construction, architecture, engineering, facility management, and field service companies, and for any team whose work happens on site and in the office.
WHAT YOUR TEAM CAN DO
• Time tracking: start recording on a job with one tap, switch to the next with another, and correct times on the spot. Attendance, absence, and vacation are in the same app.
• Technician mode: a simpler app for people on the go. The home screen shows the day's jobs, with only the chat, time tracking, and the profile next to it.
• Chat: talk in projects, tasks, and groups, and turn a message into a task when something needs to get done.
• Tasks: assign people, set deadlines, and add checklists right where the information is.
• Notes: capture information on the go and keep it with the project, task, or person it belongs to.
• Documents: attach and find project files where your team works, on the phone or the desktop.
• Search: search everything and find it in seconds.
WHY TEAMS STICK WITH IT
• Familiar from day one: if your team knows WhatsApp, they'll know OSOI. No complex training needed.
• Made for the phone: easy to use with one hand on site, with the same workspace on desktop and tablet.
• Works offline: no signal in the basement? Keep working, and OSOI syncs when you reconnect.
• Clients and subcontractors in the project: invite external partners with one click. They see only the projects they're invited to and work with your team in one place.
• Everyone knows where things stand: see who's on site, what's done, what's stuck, and who's on vacation or sick leave, without status calls.
• Your data stays yours: OSOI does not use your project data to train AI models.
GETTING STARTED
OSOI is set up for your whole company. New to OSOI? Book a demo with a product engineer at osoi.io. Already part of a team on OSOI? Just sign in.
Questions? Write to hello@osoi.io.
more Your tracker now works across your devices, in real time
Start tracking on your phone, finish on your desktop, or however you like.
Time recording in every time zone
Whether you're in San Francisco or Berlin, your hours land on the right day.
Record work on absence days
For all those moments when something needs to get done while you're away, you can now record working hours on vacation, sick, and holiday days.
Introducing Planner (beta)
For admins: one central place to see the recorded and planned work of the whole team. Switch it on in Settings.
Large files, reliably
Uploading large files now works reliably.
1.4.6 Oct 8
In rare edge cases, messages sent in a project thread could get mixed up with messages in task threads. We’ve fixed this issue and also optimized file sending in chats.
1.4.1 Sep 22
Introducing Activity Hub: Finally, an answer to “What have we actually done?”
Everything that has happened across your projects and your company now lives on one page. Who did what, where, and when, all in one place, in the order it happened. No asking around, no chasing people for updates, no piecing the week together from memory before a meeting. Open it and you know.
One time card for the whole day: Recording a day used to mean entering your attendance in one place and your project hours in another. Now it’s one card: start, breaks, end, and the work you did, all entered together, in one go.
Work types: Give every recorded hour a type that matches how your company actually works: Office, Business Trip, Workshop, or anything you define yourself. Your hours arrive already sorted, ready for whatever you need them for.
Minimum breaks: Choose your country’s statutory break rules for Germany, Austria, or Switzerland, or set up your own. Every day is checked against them, and OSOI either warns you or requires the missing break before the day can be saved. Nobody has to remember the rules anymore. OSOI takes care of it.
Overtime surcharges: Set the rules once: when overtime starts and what weekends and public holidays are worth. From then on, every day shows the hours that carry a surcharge, broken down by rate, in your tables and exports. Your bookkeeper is going to thank you for this one.
Expenses: Daily allowances, mileage, hotels, parking, and other expenses can now be recorded on the day they belong to, whether your people are on site, at a customer, or out in the field. Set up your expense types once with their amounts, mark which ones should be charged on to the customer, and rule-based expenses are automatically suggested as soon as the day qualifies.
Performance improvements: OSOI is quicker than ever.
And we’re already working on what’s next.
1.4.0 Sep 17
This release is all about time tracking. The improved Time Tracker makes recording your working day simple, from the first tap in the morning to the final timesheets at the end of the day.
Start with one tap: Start the clock on your workday with a single tap. You can also track time directly on tasks and checklist items, right where the work happens.
See your day at a glance: A visual timeline shows how your day went, with work and breaks side by side. Started a job later or took a longer break? Just drag the time into place.
Finish the day in seconds: At the end of the day, check that your time is on the right projects and submit your timesheet. Overlapping time is highlighted, so what you submit is accurate, and your tracked time stays safe even with a weak connection.
Keep the Tracker within reach: Show the Tracker on your phone's Home screen, so recording work and breaks is always one tap away.
Also new:
• Filter tasks by several projects at once, or by individual scopes of work
• Favorites appear instantly and stay in sync
• Improved and more detailed notifications
• A faster, more refined experience across the app
1.3.0 Sep 15
Introducing Technician mode for anyone who works out in the field.
• Start recording your work with a single tap and tap another task to switch right away
• Taking a break remembers what you were doing, so you can pick up where you left off with one tap
• A clear view of your day, with a large clock and your work and break totals at a glance
• Check and correct your recorded times on the spot
• A tidier home screen that keeps the focus on your work
Turn on Technician mode in your settings and try it on your next job.
OSOI is faster than ever.
• Task lists throughout the app open faster and keep working smoothly, even with a poor connection
• Choosing a project and recording your time is quicker than before
• Timesheets open faster and are easier to read
More control
• New notification settings
• See how much of your plan and storage your team is using
• A refreshed language selection
• The app now lets you know when a new version is available or required
1.2.9 Aug 29
Performance improvements and smaller fixes.
1.2.6 Aug 9
- A clearer task overview helps you see progress, statuses and checklist work at a glance.
- Improved time tracking makes it easier to manage working hours, breaks, absences, public holidays and overtime.
- Active and past contracts, vacation entitlements and carried-over balances are now easier to review.
- Chat, voice messages, files, notes, maps and project views have been refined for smoother everyday work.
- Improved notification and location controls give you more choice and clearer feedback.
1.2.5 Aug 1
Stability and performance improvements.
1.2.4 Jul 24
UI Improvements and performance optimizations.
1.2.1 Jul 15
Improvements and performance optimizations.
1.2.0 Jul 14
New Project Schedule — Plan projects visually with a clear timeline of tasks and phases, adjust dates, and keep everyone aligned from start to finish.
Faster Task Planning — Create and organise tasks more quickly with improved date selection, calendar controls, and task management.
Better Notes — Create clearer, better-structured notes with improved formatting, editing, copying, and pasting.
Improved Chat — Communicate more naturally with improved message actions, reactions, voice messages, attachments, and chat interactions.
Clearer Document Uploads — Follow upload progress more easily and manage project documents with clearer feedback.
Time and Absence Improvements — Refined time tracking, timesheets, workday summaries, and absence management make workforce coordination easier.
More Improvements — This release also includes numerous usability, performance, and reliability improvements throughout OSOI.
1.1.0 Jul 13
This update improves everyday work across projects, tasks, files, chat, and time tracking.
• Refined desktop experience with smoother navigation and cleaner layouts
• Improved task views, attachments, checklists, and task-related file handling
• Better time tracking workflows, including more reliable task-based time entries
• Improved chat attachments, voice recording, and file previews
• Updated files wording and file-related actions throughout the app
• Better support for upcoming backend improvements
• Stability and compatibility fixes
1.0.5 Jun 20
Welcome to a major OSOI update.
• Turn conversations into work - Convert chat messages directly into tasks and checklist items, keeping communication and execution connected.
• See what’s happening at a glance - Project and scope pages now highlight recent tasks, documents, chats, notes, and timesheets, making it easier to stay up to date.
• Better document management - Add descriptions to documents and download all project, scope, or task files with a single click.
• New “On Hold” task status - Mark tasks that are temporarily paused and keep project progress clear for everyone.
• Improved project search and filtering - Find projects faster and navigate large project lists more easily.
• Export notes to PDF - Create PDF versions of your notes for sharing, archiving, or printing.
• Performance and reliability improvements - We’ve made OSOI faster, smoother, and more reliable across the app.
Thank you for using OSOI and for helping us improve it with your feedback.
1.0.0 Jun 3
This is one of our biggest updates yet, bringing major improvements across tasks, projects, documents, notes, and team management.
New Features & Improvements:
• Introducing Table View for Tasks, Projects, Work Orders, and Documents
• New Time module for understanding where your team’s time is invested
• Quick Access on the Home screen for recently opened items and favorites
• Task Search to instantly find tasks by name
• Week View in Tasks for a clearer weekly overview
• Centralized Notes module with better visibility and organization
• Collapsible note blocks for improved focus and readability
• File renaming and file descriptions for easier document management
• Improved document search including file descriptions
• Project trash support for admins and project creators
• Filtering projects by creation year
• Better people management with role updates and member deactivation
We also delivered many usability, performance, and workflow improvements across the app to make OSOI faster, clearer, and easier to use for the entire team.
0.9.0 May 21
In this release we fixed a couple of smaller glitches and improved the performance of the maps.
0.8.6 Apr 23
Introducing improved Notes in OSOI. The Notes module is now a central place for all your information across projects, tasks, and private notes. Instantly search and find any note.
Maps and locations are now available across OSOI. You can view all project and work order locations across the company, so both field teams and the back office know exactly where work is taking place.
We’ve introduced a new project status, “On hold,” for projects and jobs that are temporarily paused.
Technicians in the field can now capture client signatures as proof of completed work. The back office is informed instantly, helping you move faster with invoicing.
Chat has been improved with a better message layout, file previews, and voice messages.
Performance and overall stability have also been improved.
0.8.5 Apr 22
What’s new in OSOI
• Project locations. You can now assign a location to every project or work order, so your team always knows where the work is taking place.
• Improved project setup. The project creation page has been redesigned to make starting new projects faster and clearer.
• Fixes and improvements. General fixes and performance improvements across the app.
0.8.3 Apr 12
This update brings a smoother and more reliable OSOI experience across tasks, documents, and chat.
- Improved task details and navigation behavior
- Better date and time selection when creating or editing tasks
- Improved document preview experience across platforms
- More consistent document search behavior
- Refined chat attachment options and visuals
- More reliable unread badge updates
- Improved checklist interactions and styling
- Better document save and copy behavior on desktop
0.8.0 Apr 8
Introducing the Documents module in OSOI.
A central place to access all files across projects, scopes, and tasks. Documents are now part of the work, so you can find what you need faster and keep everything connected.
Browse, search, and preview documents with ease, so important information is always within reach
Filter by people to quickly see the files connected to specific teammates and responsibilities
Other improvements
• Improved document and PDF previews for a smoother everyday experience
• Cleaner navigation and mobile UI for a more intuitive flow
• Updates to My Work Week, notes, and notifications
• Bug fixes, performance improvements, and stability updates
0.7.7 Mar 31
This release marks a major step forward in how you work inside OSOI.
We’re introducing tabs, multi-window workflows, and a new timeline planning view, all designed to reduce clicks, speed up navigation, and let you manage work the way it actually happens.
• Tabs inside OSOI (like in a browser)- We’re on a mission to reduce the number of clicks needed to get work done. You can now open up to 5 tabs and keep multiple views side by side, so everything stays exactly where you need it.
• Multi-window, multi-organization. For everyone working across multiple organizations, you can now open more than one OSOI window and work in parallel, each with a different organization.
• New Timeline planning view. Designed for teams that need precise daily planning. Schedule work within a day, manage teams more effectively, and use OSOI as a modern planning board for real operations.
• Improved desktop experience. We’re building the best desktop, mobile, and tablet experience. This release brings faster navigation, smoother interactions, and overall better performance.
• Introducing widgets. Our first widget shows time, location, and weather directly inside OSOI. More useful widgets are coming soon.
• Faster, more reliable OSOI. Improvements to messaging, file uploads, sync, and overall stability make the app quicker and more dependable than ever.
0.7.6 Mar 22
This update brings many improvements across OSOI to make daily work smoother and faster.
• New weekly work view in the schedule for a clearer overview of everything that needs to be done during the week
• Improved checklist interactions so tasks can be completed faster directly from the task view
• Major updates to timesheets and attendance tracking, including support for sick leave and other absence types
• Better project and scope management with improved navigation and handling of recently used projects
• New Activity Hub to keep track of important updates and activity across your work
• PDF export and preview for notes
• Expanded language support including Spanish, Italian, Polish, Romanian, and Turkish
• Improved contracts and overtime summaries
• UI and performance improvements across the app for a smoother workflow
0.7.5 Mar 14
This week we are bringing several improvements across OSOI to make everyday work smoother:
- New calendar week view in Schedule on the home screen. In addition to the list of due tasks, you can now view and organize work across the entire week in a calendar layout.
- Faster checklist handling. Checklist items can now be completed directly from task lists with a single click.
- Improved time tracking and vacation logging for a smoother timesheet experience.
- UX and UI improvements across the app for a faster and more fluid workflow.
- Login and authentication improvements.
- Updated translations and general stability improvements.
0.7.2 Mar 11
Performance improvements and bug fixes.
0.7.1 Mar 5
Major improvements to time tracking, tasks, checklists, and file previews
• Vacation tracking with approval process is now supported
• New Tracker for automatic check-in and check-out
• New document preview with image gallery
• Built-in PDF preview
• Many improvements to task and checklist management
• Improvements to the notes editor, chat interactions, and navigation
• Localization updates across multiple languages
• Various UX improvements and performance optimizations throughout the app
0.7 Mar 4
• Attendance tracking is now available! Log your workday separately from project hours, fully aligned with your contract so you stay compliant with company and legal requirements.
• Planned vs. Actual: Instantly compare your recorded hours with your contract schedule.
• Smarter checklists: New filters help you understand what’s done, what’s pending, and who’s responsible.
• Admin control: Admins can now change user roles directly in the app.
0.6.39 Feb 24
Your tracker now works across your devices, in real time
Start tracking on your phone, finish on your desktop, or however you like.
Time recording in every time zone
Whether you're in San Francisco or Berlin, your hours land on the right day.
Record work on absence days
For all those moments when something needs to get done while you're away, you can now record working hours on vacation, sick, and holiday days.
Introducing Planner (beta)
For admins: one central place to see the recorded and planned work of the whole team. Switch it on in Settings.
Large files, reliably
Uploading large files now works reliably.
more Version 1.4.6 Oct 8
Data Not Collected The developer does not collect any data from this app.