Know your DAS

 Rheumatoid Arthritis Management ToolScreenshot- Know your DAS app

Install (iPhone)

Install (Android)


Disease Activity Score (DAS) is an assessment used by clinicians to measure rheumatoid arthritis (RA) disease activity, to determine whether the signs and symptoms have reduced or stopped, and if treatment needs to be adjusted.

This free health app from the National Rheumatoid Arthritis Society (NRAS) is designed to help you stay one step ahead of your RA.

The assessment is quick and easy to complete and the ‘Know your DAS’ app carries out the mathematical calculation needed to produce your DAS28.

The information is stored on your device only and your progress can be shared with your healthcare professional (HCP) over time so that together, you and your HCP can build the best possible picture of your RA and decide whether any changes in treatment are needed to help improve the management of your disease.

The app features include:

  • DAS28 assessment calculator
  • Health diary
  • Video guide
  • ‘Capture your own joint’ camera feature
  • Summary of results reporting tool
  • Email results to your HCP functionality
  • Further information on DAS28

This app has been developed with support and funding provided by Roche Products Limited and Chugai Pharma UK Ltd to help people with RA more easily track and manage their disease to enable better outcomes. To know more about Disease Activity Score (DAS), visit this page. 

Roche Products Limited and Chugai Pharma UK Ltd supported the development of app and ongoing online hosting.