The Inspire HR is a mostly frill-free tracker that focuses on step counts, calories and other fundamentals. You won’t find perks like built-in GPS (though it can use your phone) or on-screen workouts here. Heart rate monitoring can be very useful for optimizing your workouts and monitoring stress, however, and this model improves on the basic Inspire with sleep tracking, goal-based exercise modes and workout intensity maps. At $70, it’s easier to justify than a smartwatch if you’re mainly interested in quantifying your exercise.