Today, the challenges of an aging society are primarily seen in frailty, sarcopenia, and impaired functionality. However, the diagnosis and evaluation of these conditions are time consuming and involve complex assessment tools and algorithms. Digital health interventions (DHIs) have recently been introduced in various areas of healthcare. DHIs have been reported to help diagnose and manage frailty and sarcopenia, increase physical activity, improve nutritional status, reduce the risk of falls, and may also have potential for improving social isolation in the future. DHIs will increase in importance as the number of older people comfortable with digital technology increases.