Question: what are the different generations of fitbits?
Answer: Fitbit Ace. Released in December 2018, the Fitbit Ace is a mini version of the Alta for children aged 8 and above. ... 
Fitbit Inspire. ... 
Fitbit Inspire HR. ... 
Fitbit Charge 3. ... 
Fitbit Charge 4. ... 
Fitbit Ionic. ... 
Fitbit Versa. ... 
Fitbit Versa 2.