Why do I have to press send for each message on my phone?
Hit Em Up app is designed specifically to message large groups of folks to save you time and money. Each message is sent privately, so it is personal and leaves the recipient with the feeling of personal connection.
To help you comply with CTIA guidelines, you must tap confirm on the message. You cannot automatically blast messages out from a personal phone line as it would get your phone line disabled.
You can read more about CTIA guidelines that carriers use to regulate sending in general that define the breaking points are between personal use and commercial use (where the fees become quite high).