Fitbit wants its latest entry-level fitness tracker to be fashionable, as it offers bands made with leather or stainless steel, rather than traditional, rubber-like material.
The fancier styles for the new Fitbit Alta will cost extra - $US60 ($A83) for leather and $US100 for stainless steel, for instance. The base model, with standard material, will cost $US130.
New features include reminders to move if you've been sitting down too long. Many competing fitness devices already have this feature, but the Fitbit hasn't had it until now.
The Alta follows last month's unveiling of the Blaze, a mid-level model. Unlike the Blaze, the Alta won't have a heart-rate monitor or a colour screen.
The Alta and Blaze will both start shipping next month. The Blaze is expected to get the move reminders in a future software update.
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Fitbit is the market leader in fitness-tracking devices, though it's still an emerging business, with questions about how long people actively use devices once they get them. Competitors include smartwatches from Apple and others.
