Table 1.

Overview of data sets (N=8).

Data set	eHealth application	Description of app	Main health goal	Device platform	Target end-user group	Participants, n	Evaluation method	Length of session (minutes)	Usability problems, n
1	Stranded	Web-based gamified app	Offers fall prevention training via video instructions in a gamified environment	Computer	Prefraila and frail older adults (aged ≥65 years)	19	Concurrent think aloud and screen capture recordings	60	66
2	N/Ab	Web-based screening module	Identifies frailty levels among older adults and supports physical exercising	Tablet and social robot	Prefrail and frail older adults (aged ≥70 years)	20	Video observation	50	64
3	cVitals	Home-monitoring tool	Allows self-management of health by providing and supporting health measurements at home	Smartphone	Patients with heart failure or COPDc (aged ≥65 years)	10	Concurrent think aloud and observations	60	39
4	Council of Coaches	Web-based coaching platform with virtual coaches	Supports a healthy lifestyle for older adults	Computer	Older adults (aged ≥55 years)	18	Think aloud and observations	60	60
5	Pandit	Web-based application	Allows self-management of health by providing insulin dosing advice	Computer	Patients with type 2 diabetes (aged 40-64 years)	5	Concurrent think aloud and observations	15	28
6	Pregnancy and Work	Informational application	Provides information on health risks and regulations during pregnancy	Smartphone	Pregnant women (aged 25-40 years)	12	Concurrent think aloud and observations	45	84
7	FatSecret	Calorie counter application	Provides nutritional information	Smartphone	Older adults with type 2 diabetes (aged ≥55 years)	10	Concurrent think aloud and observations	15	41
8	Hospitality app	Patient hospitality app	Provides information on how to prepare for a visit to medical facilities	Smartphone	Prefrail and frail older adults (aged ≥65 years)	8	Concurrent think aloud and observations	30	18

^aPrefrail refers to the initial state of a health condition called frailty. This condition entails a gradual decline in physical and cognitive functions, mostly occurring among older adults, that can lead to recurrent falls, hospitalization, and even death [37].

^bN/A: not applicable.

^cCOPD: chronic obstructive pulmonary disease.