Where do I track my Streak?

Desktop

Your pacing towards your daily LingQs goal is always shown on the right of the home screen, along with how many days you've kept your streak alive and how much time you have left to maintain your streak the current day:

iOS app

Your pacing towards your daily LingQs goal is shown on the My Lessons tab, along with how many days you've kept your streak alive and how much time you have left to maintain your streak the current day:

Android app

Your pacing towards your daily LingQs goal is shown on the My Lessons tab, along with how many days you've kept your streak alive and how much time you have left to maintain your streak the current day: