After you installed the PK4 Time Tracker for Salesforce app from Salesforce AppExchange, you should Authorize the Time Tracker app using the oAuth from Force.com.

Then download the Time Tracker for Salesforce app on the device to be able to access data from your Salesforce org. If you have not done the Authorization,  you will see an oAuth Error.

To use the Time Tracker for Salesforce app with your Salesforce Org, you need to do the following: 
  1. Allow the Time Tracker for Salesforce app to access data from your Org
  2. Install the Time Tracker for Salesforce app onto your device.
Here is what you need to do to complete these two steps:
Authorizing Time Tracker to access your Org.
  • Login to your Salesforce org with the same ID that you used when you installed the Time Tracker for Salesforce app  
  • Select the Time Tracker oAuth function
    • If you are using Salesforce Classic, click on the drop-down in the top right-hand corner of your screen. Click on the link called Mobile Time Tracker oAuth in the drop-down 
    • If you are using Salesforce Lightning, click on the 9-dot App Launcher on the top left-hand side of your screen. Click on the Mobile Time Tracker oAuth tile. 
  •  You now see a pop-up that tells you about Time Tracker wanting to access your Salesforce Org. Click on the Allow button on the pop-up to give the Time Tracker access to your Org
  • Your installation and authorization of the Time Tracker are now complete on the Salesforce side.

Please complete this process and start using the Time Tracker for Salesforce app for tracking time in your org.