Message and Call Tracker app shows notification whenever it runs in the background or when any data is being sent over the network. These notifications are not optional and cannot be disabled. Due to updated Google Policy, the app doesn't read SMS anymore. It just reads and saves WhatsApp messages (text only) and calls. DISCLAIMER The app is not a remote monitoring app and cannot be used to spy on anyone because 1. The app displays persistent notification after user registers and the notificati