The World Health Organization developed the "iSupport for Dementia" program for family caregivers of people with dementia. Objective: To explore studies on adaptation, randomized clinical trial protocols, and preliminary results of iSupport by unpaid caregivers of people living with dementia in different countries. Methods: Systematic review. Results: Ten cultural adaptation studies, eight randomized clinical trial protocols, and two preliminary results were included. Adaptation studies showed adjustments in terminology, design, and additional resources. Clinical trial protocols included burden as the primary outcome, and baseline, three months of intervention, and follow-up after six months. Studies with preliminary results found positive effects on the mental health and well-being of caregivers after using the program. Conclusion: iSupport is an online program of the World Health Organization in response to dementia in implementation in different countries.