4 stars: As a calendar, it's usable and has basic features. Reminders are good and basic functionality is working. Something to improve would be, as many people mentioned week view, because it would be by far the most usable view option and color coded events. So Having the option of different colors for different event categories like important and non important.
3 stars: I'm looking forward to having a calender that doesn't spy on me, but until they add some kind of import feature for events in the standard Android calender it would be a pain to switch over. I will reevaluate this review when/if this gets added
4 stars: Looking good so far. Stars don't really reflect the experience, as I've briefly navigated it, time will tell. One point, would it be possible to get the App icon to reflect the current date? Currently, just displays 30 and its the 21 April. A small tweak that would make me happy.
5 stars: Impressive. Haven't been using a calendar app for years. Prefer flat file. But maybe this will change now. How do I export my data? Perhaps an agenda for the Day or All events from last year? Data export should allways be a basic feature, yeah? Its My data.
4 stars: A major feature that keeps me from switching is a lack of being able to import contacts' birthdays as a calendar. Everything else is generally ready for daily use however.
5 stars: ProtonMail and their other products have an excellent track record. So it just makes sense to try the new calend...