Just select a contact, and send them any message by tapping it's own button.
This is the lite version. It only comes with 9 messages.
Get the Pro version to unlock 18 more messages for a total of 27 text messages.
This app sends text messages and may incur costs on your phone bill. Don't use if you don't have a texting plan.
This app has a lot of permissions, but not all of them are actually used. The only ones being used are looking up your contacts, and sending text messages.