During setup, the Add Integrations screen offers TrainingPeaks and intervals.icu. Tap one and sign in. You can skip it and connect later in Settings › Connected Accounts.

One calendar is active at a time. Connect both and the newest becomes active; the other stays linked but greyed out. Tap it to switch.

To disconnect, tap the active row and confirm. StemNotes stops pulling your planned workouts until you reconnect.

Garmin Connect sits in the same list. It doesn't plan anything: it sends StemNotes your recorded rides so it can work out what you should have eaten. Disconnecting it deletes the rides we hold from Garmin.

Your Karoo, Garmin Edge or watch links only once a training calendar is connected.

If you connect TrainingPeaks during setup and leave CP blank, StemNotes fills it from your TrainingPeaks bike threshold.