Are there any cheap S-Health compatible devices to use with my Samsung Galaxy S6?

[AC Question]

S-Health compatible devices on Samsung Galaxy S6

Hi,
I would like to use S-Health in the gym in order to count my steps when i use the treadmill but i do not want to have the phone in my pocket.
Are there any cheap devices that can count steps and work with S-Health because i do not want to spend 90 pounds on a gear fit just to count my steps?
Thanks