I assume people could use church bells and town clocks later on, but in the morning did people constantly oversleep?
Asking a question again is O.K. Mentioning previous answers is intended to be a quick initial boost, not to discourge follow-on questions, info, or debate.
There is an FAQ section on this on the Calendars page, https://www.reddit.com/r/AskHistorians/wiki/calendars#wiki_waking_up_without_alarm_clocks
In the app, the # anchor doesn't work. Just scroll to the bottom or search for Waking up without alarm clocks