Each app for Grades 1-5 are comprehensive with virtually infinite number of questions covering wide range of topics. All the content is aligned to common core standards.
These apps are used to differentiate math instruction and assigned practice. What you may like so much about this app is the variety of concepts that you are able to individualize. For example, if a student needs additional work on the concept of time, then you can setup the app to only give questions related to time. Questions first appear simple, but then become more challenging as questions are answered correctly. If you prefer, Splash Math will send you a weekly update indicating the progress of each student.