Use both. The Portal for work; the App for convenience.
If you are a new student (new entry), you generally cannot log in until you activate your account. unamportal
If you're referring to the Universidad Nacional Autónoma de México (UNAM) portal, here's a full post: Use both
The Universidad Nacional Autónoma de México (UNAM) is one of the most prestigious universities in Mexico and Latin America. To facilitate communication, information sharing, and online services, UNAM has developed a robust online portal for its students, faculty, and staff. In this post, we'll explore the features and benefits of the UNAM portal. If you're referring to the Universidad Nacional Autónoma
I'm assuming you meant "unamportal" but I'm not sure what that is. However, I found that "Unam Portal" or "UNAM portal" seems to be a legitimate topic.
The UNAM Portal (portalacademico.cuaed.unam.mx) is the centralized digital ecosystem for students enrolled in the Sistema de Universidad Abierta y Educación a Distancia (SUAyED) and, increasingly, for integrated services across face-to-face high schools and colleges.