Trying monitor of sensors through smartphones

I was able to enable the Mosquitto MQTT using instructable
Now I need to communicate my new wireless sensor to communicate with Mosquito in such a way that it will display tracker in which it shows the readings of sensor,
Also need to know how can to display the notification on smartphones whenever there will be some disruption takes place in defined ranges

But I am new to this are so need your suggestion and better solution which help to make it functional