Mobile App With Practice Questions

The mobile and website version of Khan Academy is very confusing because they are different. On the website I can find "skills" which I can answer questions and watch a video to explain. In the mobile app I can only see videos and there are no questions to test myself with. The app has "skills" as part of the course SAT Math with the video, but no practice questions. I like using the app because it runs more smoothly on my phone. I'd like if practice questions could be added to the app along with the videos like the website.