Signing is always free and you can send three free signature requests with your free account. Yes, you can download the mobile app and create a free DocuSign account directly within the app to get started. Do I need to have a DocuSign account to use the mobile app? All your documents and activities will sync across all your devices into one centralized DocuSign account. Yes, download the DocuSign Mobile app and log in with the same username and password used when logging in from the web. Can I use the mobile electronic signature app with my existing DocuSign account?