Ask HN: Are app update schedules a good indicator of company culture?

It seems like mobile app updates are pushed out starting from noon until 1-2am every day, and there are some like Uber and Venmo that I've noticed often get updates on the weekends, even in the evening. Do these mean that engineers had to be in then, or is there some delay in app update pushing? Are these a good gauge of a company's work/life balance?