This application is available in English, French, Spanish, Portuguese, and Russian. The language of the app will be determined by the language setting of the user’s smartphone. Based on international guidelines published in 2022, which were developed with methodological support from the Institut National du Cancer (INCa) in France and endorsed by the International Society on Thrombosis and Hemostasis (ISTH), this app is a practical step-by-step guide for the prophylaxis and treatment of venous