I tried a super cheap one (sub £10) out of morbid curiosity*, and even though they “work” (as in they have a nice colour screen and can show your heart rate), the software is so poor that they’re not much more than Xmas cracker toys. IIRC you could log a workout but it wouldn’t activate the HR monitor during it...
I’d avoid anything you don’t have a personal recommendation that it actually works.
I tried a super cheap one (sub £10) out of morbid curiosity*, and even though they “work” (as in they have a nice colour screen and can show your heart rate), the software is so poor that they’re not much more than Xmas cracker toys. IIRC you could log a workout but it wouldn’t activate the HR monitor during it...
I’d avoid anything you don’t have a personal recommendation that it actually works.
(* I already have an Apple Watch)