Now-a-days, the remote home automation turns out to be more and more significant and appealing. It improves the value of the people lives by automating various electrical appliances or instruments. This paper describes GSM (Global System Messaging) based secured device control system using App Inventor for Android mobile phones. App Inventor is a latest visual programming platform for developing mobile applications for Android-based smart phones. The Android mobile phone Platform becomes more and more popular among software developers, because of its powerful capabilities and open architecture.