What This Means
This research suggests that a smartphone app called Neurum, used for four weeks, can meaningfully reduce depression, anxiety, and stress in working adults. The study randomly assigned 201 employed adults to either use the app or serve as a control group. The app offered tools rooted in cognitive behavioral therapy and mindfulness, allowing users to log their moods and complete mental health exercises throughout their day. After four weeks, people who used the app saw their combined depression, anxiety, and stress scores drop by about 14.5 points on average, while those in the control group saw scores rise by about 3.3 points — a statistically significant and large difference. Stress reduction appeared to be the biggest contributor to this improvement.
However, the study also found some notable challenges. Many more people dropped out of the intervention group (21 people) than the control group (2 people), which raises questions about the app's long-term appeal or ease of use. Among those who continued, average engagement was relatively low — about 5 minutes per day and only about 6 completed exercises over the entire four weeks — and higher engagement did not statistically predict greater improvement in mental health scores. This means it is not yet clear what 'dose' of app use is needed to see benefits, or why some users disengaged.
This research matters because workplace stress is a widespread problem, and access to affordable, convenient mental health support remains limited for many people. This study suggests that a smartphone-based tool could serve as a practical, lower-cost supplement to traditional mental health care for working adults who are not in clinical treatment. At the same time, the high dropout rate and variable engagement highlight that designing apps people will actually use consistently remains an important challenge for digital mental health research.