iOS: tap the attachment, a cma7 or cmr7 file, and select Copy to Coach 7. Coach 7 App starts en opens the activity. The Activity will be saved in the Coach 7 User, in the folder called Inbox.
Android: tap the attachment, a cma7 or cmr7 file, Coach 7 App starts en opens the activity. You can also save the file into Device Storage > Download.