To access Canvas content, you could create a parent observer account to use your student’s login information. Canvas can be accessed through a web browser or through an app version.
Canvas Support for Parents(English)
Overview of Canvas App for Students
114a – Canvas by Instructure for iOS from Canvas LMS on Vimeo
Written Overview (from Canvas)
How to Log into Canvas app (from Canvas)
How To Authorize Google Through Settings (Students Must Use Safari For This Process)
How to Authorize Google in a Course
View Announcements (from Canvas)
Submit an Assignment from 3rd Party App (from Canvas)
214 – Assignment Submissions from Canvas LMS on Vimeo.