No, the students see a slightly different view of their grades when they look at them on the mobile app. You may want to have them check their My Grades area from a regular computer if they are confused by what they see in the mobile app. The main difference is that the mobile app has a percentage field in front of each item even if you assign points, not percentages, for their grade.
For example, a student takes quiz 1 worth 20 points and gets only 5 points. When they view this in My Grades on the mobile app, the first column will show 25% and the second column will show Quiz 1 points: 5/20. If they look at this same item on a regular computer, they would see Quiz 1 Grade 5.00/20 and there wouldn't be a percentage listed.