I have a fitbit charge 2 its decent. it provides all the things you have listed as you know. https://dev.fitbit.com/uk https://dev.fitbit.com/uk it has an api.

I have a fitbit charge 2 its decent. it provides all the things you have listed as you know. https://dev.fitbit.com/uk https://dev.fitbit.com/uk it has an api. knock yourself out