Private Messaging Apps

These are apps that are referenced in our podcasts and videos that allow users to manipulate messages.
Private Message Box
Calculator Plus

More about apps that are used for text messaging that are disguised as calculator apps.
https://www.qustodio.com/en/blog/how-to-spot-a-fake-calculator-app/
https://datadoubles.org/whats-behind-hidden-cheating-app-icons/