Global Sms app lets you save text message templates in the Saved Message Screen.
This way, you can select a message from the selection box (see screenshot) on the Send text message screen, update the content if necessary, and send it to your recipients.
This options saves a lot of time.
If you have written a new message and you want to save it as a saved messages, all you have to do is click the + button saved messages selection box
and this message will be added to your your saved messages immediately. You may update it any time.