Table 2.

Relevant sources of information for each block of items.

Data items	Relevant sources of information
Postnatal care for mothers and newborn infants	Recommendations and guidelines on postnatal care [6,20] Studies about maternal health during the postpartum period [17,25–30]
Postnatal counselling	Counselling guides for maternal and newborn health care [31–34]
Reminders and push notifications	Studies tackling the use of reminders in mobile apps for maternal health medication adherence [36,37]
Notes and records	A study analyzing functionalities of personal health records for prenatal care [16]
Social support	Studies endorsing the importance of social support in improving maternal well-being during the postpartum period [38,39]
App technical features	Studies about security and privacy concerns in mobile health applications [40–42] Internationalization requirements catalog for health applications [43] Studies evaluating mobile health applications’ compliance with usability guidelines and standards [44–46] Reusable usability requirements repository for mobile health applications [47]