The application should be working a lot better on new versions of the app (3.1.0+). If you are receiving no reminders at all, please refer to our troubleshooting guide: https://calendarsnooze.uservoice.com/knowledgebase/articles/1838176-no-reminders-at-allKen L commented
I have just reinstalled this app. It was not working for several months so I uninstalled it. I was hoping it would start working again. It works now, but there are no reminder sounds. When I try to select a reminder sound, the sounds won't play. The same sounds play in other apps.