The folks at Basis have updated their design but have lost none of the original drive that made their first fitness and sleep tracker important in the first place. Basis Peak is an upgrade in every conceivable way, from the solid design update and fantastically responsive display to the hardware responsible for data collection. The whole point of Basis from the beginning has been to accomplish the most accurate picture of your health with hardware that is constantly monitoring. Not only do you get a clearer picture of your health throughout the day, but Basis is using some clever contextual software to simply know when you are doing things. This means no prompting for sleep mode or workout mode, but the app will still be able to accurately demonstrate when you fell asleep or how long you were riding a bike.
What you won't find on the Basis Peak is any smartphone notification integration of any kind. This is a connected fitness and sleep tracker through and through.