Can I install the joyn app on my Windows Phone? Thaïs Updated April 07, 2018 06:38 Follow Our app is only available for iOS and Android devices. If this were to change in the future, we'll let you now! Related articles Can customers enjoy a joyn loyalty card without using an email address? Can I link a new card to an existing account? Will the original card remain active if I do? I've lost my Qustomer card, but I already have a new joyn card. What should I do to keep my Qustomer points? I can't see my Qustomer points in my new joyn account? Comments 0 comments Please sign in to leave a comment.