Bloomz is a free iOS/Android app for communication that I just found out about from Free Technology 4 Teachers. Bloomz reminds me of a cross between Class Dojo and Remind as it lets teachers communicate w/ parents by sending them class updates such as: pictures, emails, events, reminders and more.
The way this work is a educators signs up then selects their school. Once their school is selected a teacher can then create a class an invite parents to join their class. All communication is private as teachers control who gets invited and is secure. Then parents will get updated automatically via texts in real-time or for those that don't sign up can receive an email. Educators can even schedule parent teacher conferences using Bloomz.
I highly recommend checking out Bloomz by clicking here!!!
Below is a brief demo video...
For my Pinterest board on Mobile Phones in Education click here.