Currently, the minimum you can do is days. Would you like us to add an hours option?

That would be great!

I see that you've added this feature, but I have a question.

Does it update every XX hours for one day, or for all time?

It would update all the time. We are going to be adding an end time - so you can have recurring messages sent until a specific point in time.

We have now added an end-time so that recurring messages will be sent until a specific date and time.