Is There an App for That? A Review of Popular Apps for Depression, Anxiety, and Well-Being

Abstract

Smartphone apps for mental health (MH apps) and wellness reach millions of people and have the potential to reduce the public health burden of common mental health problems. Thousands of MH apps are currently available, but real-world consumers generally gravitate toward a very small number of them. Given their widespread use and the lack of empirical data on their effects, understanding the content within MH apps is an important public health priority. An overview of the content within these apps could be an important resource for users, clinicians, researchers, and experts in digital health. Here, we offer summaries of the content within highly popular MH apps. Our aim is not to provide comprehensive coverage of the MH app space. Rather, we sought to describe a small number of highly popular MH apps in three common categories: meditation and mindfulness, journaling and self-monitoring, and AI chatbots. We downloaded the two most popular apps in each of these categories (respectively: Calm, Headspace; Reflectly, Daylio; Replika, Wysa). These six apps accounted for 83% of monthly active users of MH apps. For each app, we summarize information in four domains: intervention content, features that may contribute to engagement, the app’s target audience, and differences between the app’s free version and its premium version. In the years ahead, rigorous evaluations of highly popular MH apps will be needed. Until then, we hope that this overview helps readers stay up-to-date on the content within some of the most widely used digital mental health interventions.