Inside Coach Catalyst, you have the ability to connect to a variety of health tracker apps. To get these linked to your account in the left sidebar click on your avatar > settings > Integrations and Apps.
Coach Catalyst Apps is where you can find CC software items that you want to connect or disconnect including workouts, branded apps, communities, and nutrition.
This nutrition is a connection with Cronometer, which you can also find under integrations.
Below you can see the scroll of all the integrations.
Here is the list:
MacrosFirst
Cronometer
FitBit
Oura
Training Peaks
Under Armour
Fat Secret
Withings
Polar
Eight Sleep
Google Fit
Garmin
WearOS
Apple Health