Which software can send express group messages?

Express assistant, very easy to use, very suitable for express mass notification. It's especially convenient and quick to remember numbers. Just use the camera to scan the mobile phone number on the list. Can send text messages and voice notifications in groups, double insurance. After the notification, you can also look at the SMS status and group call status to find out whether the other party has received the notification. Save a lot of time for the courier. And the working efficiency is improved.