For big things like work, holidays, planned dinners etc we use the Calendar app so we're both synced with each other's schedules. That helps a ton, and also a backup physical calendar on the fridge. The fridge calendar we sometimes use for meals if I mange to get any meal planning done.
I can't use any other apps for life related to do lists.. it's never seemed to work for me. I'm the same as @Ladida I think, I forget to look at my phone and the list in the first place! I mostly use a bullet journal to keep track of things that need doing and minor events that would normally slip my mind. I think writing it down helps me remember so much better. I like that the bujo is customisable and I can make my own pages and layouts to help me remember or track stuff.
Chores get done when I see them or when I think about it.. all the important stuff like dishes and laundry get done every other day but cleaning is the one that is just random whenever I get time or the itch to clean. Maybe an app would help me remember what needs doing lol.
I do use Fitbit for my step and sleep tracking, I have an Alta that I wear all the time. Although I haven't really looked at the data for ages.. We also have one of those nice digital scales that sync with the Fitbit app to keep track of our weight.