I am a big fan of using Samsung native apps. While there maybe better messaging options out there I use the Samsung messages as my main messaging app.
One of my favorite features is the ability to schedule messages.
How I actually use it, if I promised to get back to you with an answer by a certain time, example by tomorrow when get to work at 10am. I would set my response up in messages, shedule the date and time for delivery and it would automatically send. My customers love the fact that I always keep word in a timely manner.
Here is how to set it up.
1.Open Samsung messages
2.In New conversation, click the "+" plus sign.
3.Select the schedule messages icon
4. Set when to send the message ( Date and time )
Your message will be sent automatically on the preset date and time.