What's a good Android app for streamlining communication between educators, students, and parents, especially considering the need for accessibility on various devices?

As someone who juggles teaching, research, and administrative duties, I appreciate efficient communication tools. Remind offers a novel approach to an old problem: keeping everyone on the same page. The ability to send quick announcements and direct messages is an interesting implementation of communication theory. What's particularly intellectually satisfying is its cross-platform compatibility. Students and parents can receive messages on their phones, tablets, or computers, which is crucial for equitable access. I can see this being pedagogically sound for large lecture courses or even smaller seminars where timely updates are essential. Plus, it's helpful for managing the constant stream of information in an academic environment. I also appreciate that it helps with managing citations and deadlines.