Suggestions
Sleep quality
I get how you are simply showing data from Fitbit (who don’t have some kind of sleep quality calculation either), but it would be really helpful to have a way to quantify how well one has slept instead of having to mentally parse sleep, wake, and the (sometimes dubious) sleep stages shown in the Fitbit app. Off the top of my head, this could perhaps be based on some kind of equation comparing how long each sleep stage lasted versus how much is recommended, or something similar. Sorry if this is vague, but I’d love to discuss this idea further if possible!