Japanese Society of Vascular Surgery JCLIMB Committee published papers investigating the prognosis after revascularization in patients with comprehensive chronic lower extremity ischemia (CLTI) (Miyata T et al, Br J Surg. 2022 and Miyata T et al, Euro J Endovasc Surg. 2022) is an app for risk assessment. This application does not provide medical treatment or health guidance, and does not guarantee the effects of treatment of specific diseases, improvement of symptoms, or improvement of other health conditions. In addition, we do not take any responsibility for the result of using this application.