BulkSMS is a free, handy, and extremely easy-to-use application to deliver SMS messages in bulk, to a list of contacts. It’s very intuitive to use and it’s designed to be highly efficient, since it is an Android app and will take up as little memory as possible.

The messages can be customized using additional fields from the source file or by utilizing environment variables. This allows for personalized messages that include recipient-specific information such as their name.

The flexibility of the application extends to its functionality while running. Users can choose to run it in the foreground, minimize it, or even turn off the screen, and it will continue working in the background to send the messages seamlessly. During the sending process, users are provided with live progress updates both within the application's user interface and in the phone's notification bar which ensures transparency and a live monitoring of the whole process.