Setlist Helper has been updated with the following feature:
Total time per set now visible in Set Breaks
In order to use this feature one or more of your songs need to have the song length populated. Insert a Set Break after a group of songs and you will see the total set time after the songs. Feel free to use Drag and Drop to move your set break around.
The Setlist Helper Android app has also been updated to show the total set time. See the screenshot below.