Interview Scheduling Software Resources

I wanted to create 30-minute meetings, with a 15-minute buffer. With how the system is set up, people go to select a time and it looks like they are selecting 3 different times - because of the little segments. This resulted in losing at least 30 minutes at least (more when looking at a whole day) of the meeting time. Is there a way for the buffer to be after the meeting and not before? I fixed this issue by creating 30minute calendar events with specific names for YCBM to detect - and I manually separated them by 15 minutes. By the way, I am not that picky about how long the meeting should and the break, but my boss who I manage scheduling for is. I guess this is not a question, but a hope for a fix.

I can't just block a set time before meetings as some meeting take just ten minutes of travel time while others can take up to an hour.

What is Setmore app?