Engage, Develop, Learn: a pilot randomized clinical trial to test if a mobile application can enhance home support for early cognitive development among children living in poverty.

Background: Mobile applications (apps) exist to promote early child development; however, few studies have examined use of these apps among low-income families. Our objectives were to measure engagement with the Engage, Develop, Learn (EDL) app and determine if it promoted engagement and behavior change among low-income caregivers. Methods: We conducted a pilot study among English and Spanish-speaking, low-income families with children ages 12 to 15 months who received either the EDL app or injury prevention text messages. Baseline data were collected and interventions delivered over two home visits. App engagement was measured using messages opened. Caregiver development-promoting behaviors were measured with STIMQ score changes from baseline to follow-up at child age 2 years. We conducted key informant interviews among families randomized to receive the EDL app to identify barriers and facilitators to app use. Results: A total of 100 caregivers were recruited at their children's preventive care visit with 50 randomized to receive the EDL app and 50 to receive the injury prevention text messages; however, only 25 in the development app and 34 in the injury prevention group completed both home visits. Follow-up data were collected from 14 in the development app group and 30 in the injury prevention group. Over 10 weeks, 24% (6/25) remained engaged with the development app. STIMQ scores did not differ between groups. Barriers included technical difficulties accessing the app, social stressors, and 'forgetting' to use it. Conclusions: Our pilot randomized trial of a child development app suggests that it may not be effective for promoting behavior change among low-income caregivers due to low engagement. Trial Registration: This pilot trial was registered with ClinicalTrials.gov (ID NCT02717390).