Your streak tracks how many workouts you complete in a row. You don't need to train every day to keep it — your streak is only affected on days you have a workout scheduled as part of your core training plan.
Optional and Bonus workouts don't count either way. Completing them won't extend your streak, and skipping them won't break it.
If you have additional questions or need further help, contact us at support@peakstrength.app.