About Public Challenges
All challenges are private with the exception of our monthly Featured Challenges. Each month, we offer featured public challenges that are hosted by the Challenges app.
These normally do not run the full month - we allow a handful of rest days at the end of each Challenge, and before the next one begins.
These appear on the main dashboard of the Challenges app. No code is required to join the public Featured Challenges - all you need to do is tap "Join."
If you are not interested in joining the featured public Challenge, you can set up your own private Challenge and compete with friends. This help center article explains how to do so.
You can also hide the 'Featured Challenges' section by tapping on the collapse button found on the right side of the section.