https://finance.yahoo.com/news/fitbits-latest-fitness-tracker-lets-monitor-kids-102406728.html > You’d be forgiven for thinking that Fitbit didn’t put a lot of effort into developing the Ace. It’s the Fitbit Alta with some features stripped away. > a fantastic tracker that monitors your pulse. Instead, it’s based on the Alta, which came out in early 2016 and doesn’t have a heart monitor." data-reactid="38">It’s not even based on the Alta HR, which is a fantastic tracker that monitors your pulse. Instead, it’s based on the Alta, which came out in early 2016 and doesn’t have a heart monitor.