Hello @KayMiles and welcome to the Community. I looked at your public profile and can see that you are a long time Fitbit user. Can you please give more details? If you are referring to the Fitbit mobile app, it hasn't changed in a few years.
Laurie | Maryland
Sense 2, Luxe, Aria 2 | iOS | Mac OS
Take a look at the Fitbit help site for further assistance and information.