I'm loving the new option to 'share' the results from the Challenges. However, once you collect enough of these, you will have a hard time distinguishing between them. How about an option to put the date (and possibly time) on the challenge image like this?

Moderator Edit: Added Labels
Frank | Washington, USA
Fitbit One, Ionic, Charge 2, Alta HR, Blaze, Surge, Flex, Flex 2, Zip, Ultra, Flyer, Aria, Aria 2 - Windows 10, Windows Phone
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