This is a calendar, to-do list and project manager all in one. Superb. Beautiful UI, simple and intuitive, works like a charm. One two cons is that it only accepts google calendars, and that there's no native app for MacOS/Windows. I cannot convert to Edo Agenda unless I can use it with my work Office 365 calendar.
Ease of use, it does a lot in one app so I can delete a few others
It NEEDS to accept Office 365 and other calendars.