Hello everyone!
I wanted to point out a new application available on the market: FYEO SMS. Using this application you have a full invisible management of your most personal SMS!!! It provides an access code and a lot of options for the notification of these incoming secret messages, such as the notification icon to show in the notification bar, the sound to play, the vibration and the notification text. I tried FYEO SMS for two weeks and it works like a charm, even if it has a very simple user interface with little graphics. Be noted that, unlike other similar apps, battery consumption is very very low or negligible.