This easy to use free app provides a convenient way to calculate the CHA2DS2-VASc score and associated risk of stroke. It contains a link to the latest treatment standards and a link to a HAS-BLED app to calculate bleeding risk used in some treatment standards. Everything is presented on one screen for ease of use and it will work on phones with a relatively small display. Both the "Ischaemic stroke risk" and the "Stroke/TIA/peripheral emboli risk" are shown according to https://www.ncbi.nlm.nih.gov/pubmed/22246443. Tapping either one of the result buttons will link to the reference article. Tapping the header title or the score button will link to an explanation of the CHA2DS2-VASc score.