- Aug 7, 2007
Also consider a chest strap HRM that links to the polar app on your phone via BT. Normally they go for under a grand.Hey everyone. I don't wear a watch, but need one to keep tracking my HR. What is the cheapest HR watch I can possibly buy which will work with Vitality? I'm on Android and usually go the the gym about 5 times per week for what its worth.