Most fitness trackers want you to look at them constantly. The WHOOP 5.0 has no screen, tracks everything anyway, and just hit its lowest price ever.

Most fitness trackers want you to look at them constantly. The WHOOP 5.0 has no screen, tracks everything anyway, and just hit its lowest price ever.

If you want a sleep tracker with clinical-grade data, choose the Whoop MG — now up to $60 off in new Amazon Prime Day deal