Time Master is used by individuals working independently, to attorneys from some of the biggest law firms in the USA. If you need to keep track of time and expenses, you can’t find a better app than Time Master. We at On-Core are IT professionals, so we have firsthand experience with billing and keeping track of time. We know from personal experience what is needed and have made this app so flexible, it works for virtually anyone in any industry in which time needs to be kept. Features: - Track time by start, stop and/or by duration - Sessions option can track "punch-in & out" for a single time entry - Single or multiple running timers - Timers keep running even if you are not running the app - Time Entries are by Client and can be sub-categorized by Project, Task and/or Category - Powerful billing rates that can be defined in the following priority: Global, by Client, by Project, by Task or Custom per entry - Powerful Time Rounding: by hour, minutes and/or seconds - Multiple Filters to sort and view only what you need to see - Define the day of the week that your work week starts - Track Expenses - from Mileage to Meals to Burning CD's and anything else you want to define - Display Reports right on your device that you can view and export via email in HTML and/or CSV format. - Timesheet Reports - Import Client information from your contacts - Dual taxes for countries such as Canada - Full Backup & Restore capabilities - and so much more! OPTIONAL MODULES (one-time additional fee required as an "In App Purchase"): - Invoicing: If you want to do billing directly from your device then look no further. The most powerful invoicing module built directly into Time Master. Professional PDF invoices can be emailed to the client, including your own logo. - Quickbooks Export: Easily export your Time Entries to QuickBooks via an IIF file. See website for additional details before purchase. - Sync: Wirelessly synchronize two or more devices via Wi-Fi. If you have multiple devices and want to keep the data synchronized between them, this is for you! Time Master can track both time and expenses. You can track time using start and stop times, duration, and/or timers. All time entries are tracked for a single day, so time entries cannot be greater than 24 hours. It will allow you to time across days, for example if you start a job at 8 p.m. and finish at 2 a.m., it will have a duration of 6 hours. Expenses can be setup for recurring fixed cost items, such as burning a CD, reimbursement of hardware items, or fluid things such as toll expenses, automobile mileage, etc. Quick reporting can be done on the device with the Reports function. The report can be emailed in an HTML and/or CSV format. Adding new Clients, Projects, Tasks and Expenditures is super easy. You can create them on the fly without having to navigate to a separate maintenance screen. To edit them you can tap on Setup, do you edit and then return to where you left off in Time Entries or Expenses. By selecting a Project or Task first will automatically fill in the Client field for quick entry. We’ve made everything as seamless as possible, as you would expect from a top class Windows application. Visit us on the web to download the documentation or visit our Forums.

Available on



Version notes

Version number: Varies by device

New in this release: - Additional Calendar Control fixes

System Requirements

OS Windows 10, Windows 8.1
Architecture x86, x64
OS Windows 10, Windows 8.1
Architecture x86, x64

Additional info

Published by
On-Core Software LLC
Copyright On-Core Software LLC

Approximate download size
5.54 MB - 10.44 MB


This app can
Use your webcam
Use devices that support Near Field Communication (NFC) services
Access your Internet connection and act as a server.
Access your home or work networks
Use your pictures library
Use data stored on an external storage device
Access to your Account’s username and picture

In-app purchases
$5.99 - $9.99

Install on up to ten Windows 10 devices.

Language supported
English (United States)

Publisher Info
Publisher Website
Publisher Support

Additional terms
Time Master + Billing privacy policy

Ratings and reviews

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Platform: PC

Excellent software for the Independent IT professional

I have been using the program on the IPad for the last several years, excellent. Five Stars. I'm giving the rating of 5 Stars for the Windows Machines also. While there is no version yet for Windows Mobile, I am now using the program on the Windows 10 machine and my Windows 10 laptop. One of the things I was concerned about is the ability to extract the files from the IPad to the other machines. While the instructions are ok for exportation to the other machines, I found the Sync Module Excellent! Best $6.99 yet. Wireless or Wired. Was able to sync from my IPad to the other two Windows machines and vise versa without having to think about it. When Windows 10 gets ported to the Nokia Icon, rest assured your software will be one of the first on the list. I am able to track all types of expenses, including automobile mileage, and do my billable time via project and/or client from the same app. Easy to use and makes billing easy to accomplish.

3 out of 3 people found this helpful.




Platform: PC


I bought this application in the hopes it would satisfy my needs. Perhaps I received a defective product, however, the application did not even remotely behave as described. There were absolutely no menus available to assist with navigation, which would have been helpful. When the application opens, you find yourself on a blank time entry screen. I made over 5 attempts to enter a client name, but each time the application refused to save the data. Same problem with entering my hourly rate. It wouldn't save the data. When I clicked on the "Reports" button, I could not, for the life of me, figure out how to get back to the prior screen. As I said, there were no menus or other help function that might have offered a clue. In complete frustration, I uninstalled the application 1 hour after purchasing it. If you are looking for an application that has some type of logic behind it and uses some form of intuitive user interface, you should look elsewhere.

One person found this helpful.




Platform: PC

Outstanding Software and Support

I have been a Time Master user for the past 3 years on the IOS platform. The software has made it easy to track my time and bill utilizing the integrated invoicing module. My one big wish was having Time Master on my PC. Thankfully my wish was granted by the team at Time Master. This program is invaluable for anyone that needs to track their time and expenses. The program is user friendly and support for their team has been timely and helpful. I highly recommend Time Master!

5 out of 5 people found this helpful.




Platform: PC

fix it now or give me my money back

None of the drop down fields are changeable. Can no longer export a report. Is not working after multiple restarts including computer restart. Not user error!




Platform: PC

Great program

I use the invoicing module and don't think I could ask for much more for my needs. I a sole-proprietor who has to invoice for work I do by the hour and this app tracks my hours worked and allows me to invoice and track payments and apply those payments to specific invoices. I'm very happy with it.

3 out of 3 people found this helpful.




Platform: PC

Lacks full functionality and has bugs

My calendar picker is still wrong. More importantly, I can't create invoices from the Windows app. This program is hardly useful without it.




Platform: PC

Very useful

Really like this app for keeping track of my time. I almost always have two timers going to track my per project/task time as well as total time at the office. I like the format of Client, Project, Task and use the Categories same as Classes in QuickBooks. The transfer to QuickBooks is easily done manually by utilizing the Reported/Not Reported checkoff.

One person found this helpful.




Platform: PC

Works and Great Support

I have used this on iOS in the past and loved it then. Works great here too. I had a couple little issues when first starting to use it and the support has been great. They have fixed the issues about as quickly as humanly possible.




Platform: PC

Great attorney timekeeping

Apparently it is difficult to create useful timekeeping software. Time Master is very, very good and stands out from the approximately two dozen apps that I have tried.

One person found this helpful.




Platform: PC

The best in class.

It would be nice if the add-ons I bought for iOS worked with Windows.

One person found this helpful.



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