I was wishing for an app that would help and support MBSR graduates continue their practice beyond the eight weeks. Well, Oxford University has one for MBCT. The "Deepen your practice" web page is here: http://mbctapp.oxfordmindfulness.org/practices/deepenpractice/, and a lot of these practices are relevant to MBSR graduates as well.
Best of all, the 8-week MBCT course and "Deepen your practice" are free, and a free app is available for your phone - search for "Oxford MBCT" in the app store (I know there are 500+ mindfulness apps out there, but give this one a try)
Home page: http://mbctapp.oxfordmindfulness.org/users/dashboard. It is relevant for folks who are taking the course right now, or have taken it in the past.
"...to help participants with the home practice element of their Mindfulness-Based Cognitive Therapy course."