Table 2. The use of mobile apps for health-related purposes before and during COVID-19.

Mobile app usage	n/N (%)
App usage status during the pandemic
Current users	302/504 (59.9%)
Past usersa	103/504 (20.4%)
Never-usersb	99/504 (19.6%)
Self-reported changes in app usage during COVID-19
Used app more	192/401 (47.8%)
Used app the same amount as before COVID-19	176/401 (43.9%)
Used app less	33/401 (8.2%)
Top 5 most popular apps used for health purposes
Pre-COVID	YouTube (85/263, 32.3%) Facebook (82/263, 31.2%) Apple Health (80/263, 30.4%) Instagram (69/263, 26.2%) Fitbit (67/263, 25.5%)
During COVIDc	Zoom (54/163, 33.1%) YouTube (37/163, 22.7%) Facebook (19/163, 11.7%) Calm (18/163, 11%) Fitbit & Houseparty (10/163, 6.1%)
Purposes for app usage during COVID-19
To stay active	248/298 (83%)
To eat healthily	77/298 (26%)
To sleep better	78/298 (26%)
To reduce/quit smoking	2/298 (1%)
To reduce/quit alcohol	3/298 (1%)
To connect with other people	109/298 (37%)
To manage mental health	99/298 (33%)
Physical activity purposes for app usage during COVID-19
To track activity levels	196/246 (79.7%)
To join a live class	74/246 (30.1%)
To follow an exercise video	148/246 (60.1%)
For social aspects (to compete or share progress)	83/246 (33.7%)

^aPeople who used apps consistently (e.g., use an app more than 5 times) for health purposes in the past, but were not currently using them during the pandemic

^bPeople who never used app for health purposes

^cNew apps adopted for health purposes during COVID-19