A stand-alone software application intended to aid assessment of vascular stenosis and/or endovascular interventions, by producing a three-dimensional (3-D) cardiovascular model which has features of predicted blood flow data and/or endovascular device deployments. It typically uses computed tomography (CT) images and may be intended as an alternative to invasive techniques (i.e., invasive blood pressure, invasive fractional flow reserve, angiography); it is not intended to store patient records. It is designed to be installed on an off-the-shelf computer/smart device.