Website:
Sign in and click 'Track', the heart icon (2nd from the top) on the left side rail
iOS and Android Mobile app:
Sign in and tap the heart icon with the word 'Track' at the bottom of the app
Website:
Sign in and click 'Track', the heart icon (2nd from the top) on the left side rail
iOS and Android Mobile app:
Sign in and tap the heart icon with the word 'Track' at the bottom of the app