Round Schedulers Option to Nearest 15min

I am a college student and my classes end at uneven times: 9:25, 12:35, 2:40 etc.

This means that the options shown to clients are not the usual :00 :15 :30 :45 but random times that are hard to remember. We should be able to set the "resolution" of meeting times to 10m, 15m or 30m. I know Calendly and every other scheduling solution offers this so its a little bothersome that the most expensive one of all of them doesn't have this.