SurveyCTO is a mobile data collection platform that is secure, scalable, and designed for offline use, making it ideal for researchers and professionals. It is especially valuable for COVID-19 tasks such as case tracking, facility readiness assessment, and epidemiological studies. However, its applications extend beyond the pandemic, supporting research, impact evaluations, monitoring and evaluation (M&E), and supply chain assessments. The platform also offers resources to help transition from in-person to remote data collection methods, including telephone interviewing (CATI), with a focus on communicable diseases in health-related areas.