Participants with CAD or PAD or both will be directed to download the Care4Today® (C4T) Connect CAD-PAD mobile application on iPhone or Android device to assess engagement and usefulness of C4T in disease management for 3 months. No study drug and other treatment(s) will be provided as a part of this study. All aspects of treatment and clinical management of participants will continue to be in accordance with local clinical practice and applicable local regulations, and at the discretion of the participating physician.

Participants will not receive any drug intervention in this study. Participants will use Care 4Today® Connect CAD-PAD mobile application for 3 months. The study will assess participant engagement and usefulness.

Percentage of participants (of those who onboarded the C4T CAD-PAD app) who use CAD-PAD the application for at least 10 weeks during the 3-month study period will be reported. The weekly app use is defined as using at least one component of the app once a week.

Percentage of engaged participants who complete end of study survey with satisfaction response score of >= 2 for at least 3 questions (out of 6 total questions) will be reported. Satisfaction survey consists of six questions in the end of study - each with 5 possible responses on a likert scale (1-5). The lowest possible response to any question is 1 =disagree and the highest possible response to any question is 5 = agree. Higher response on this scale represents more agreement or satisfaction.