I'm using habitica but honestly I hate the app and there is some drama there that may make me leave. Also I have integrated all my calendars so it is all linked to my Google calendar and shows work and personal. And Trello it's a virtual kanban board with cool integrations
I also use Trello! Been using it for a decade to track assignments for classes (at the graduate level now) and other things I need to get done - the calendar subscription is super helpful because it puts all the due dates right into my iPhone and google calendars
Im using it to keep track of buying a house with my partner (there are so many little steps) and I love being able to leave comments so I remember or so he can update me on stuff.