Telemedicine refers to remote clinical consultation (typically by video or phone), mHealth refers to the broader use of mobile devices for health purposes such as SMS appointment reminders or symptom-tracking apps, and an electronic health record (EHR) is a digital, longitudinal record of a patient's clinical history that in principle can be shared across providers. DHIS2 (District Health Information Software 2), an open-source platform originally developed in Norway, has become the dominant system used by health ministries across Africa, including Nigeria, to aggregate facility-level data -- such as immunization counts or disease case reports -- into national dashboards that inform resource allocation. Despite clear potential, digital health adoption faces real barriers: inconsistent internet connectivity in rural facilities, a shortage of staff trained in digital data entry, fragmented systems that don't talk to each other (an interoperability problem), and legitimate data privacy concerns when handling sensitive patient information. Because of these constraints, many effective digital health tools in African contexts are intentionally designed to work over basic SMS or with offline-first functionality, rather than assuming constant high-speed internet access.