The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Credly, LLC:
Credly is the universal way to recognize, share and celebrate achievement in any setting. Use Credly to give credit, digitize credentials, or issue digital badges. Share and display badges you earn for any of your achievements when and where it matters: in person, on your social networks, or on your curated Credly.com profile. App highlights:-Design beautiful badges right from your phone-Issue credit to anyone, at a moments notice (whether they have a Credly account yet or not)-Select or create audio, video, or photo evidence for credit you issue-Accept or reject pending credit / badges-Display earned badges on Facebook, LinkedIn, Twitter-Also share badges via SMS or email-Flash a convenient ID Card view for easy in-person verification of your credentials -Notification badge on home screen of pending badges-Trust badge issuers for easy future acceptance of credit they give you-Bulk issue credit to your Credly lists or choose from the contacts on your phone-Follow the achievement of others, and view the evidence that backs up their accomplishments-Give badges to an entire group of people at once (i.e. a class or conference attendees)-View and edit your Credly.com profile-All badges are Open Badge (OBI) compliant and can be sent to the Mozilla Backpack via Credly