Splash Math is an online site and can be downloaded as an app to a tablet!
We have a class account where students can practice math by playing games. The math games match the standards that students should be mastering in First Grade. I will occassionally assign some games to the students, but you can also play games as you want by clicking on the curriculum tab. I get feedback on each students' mastery of the skill and can use this data to better help each student.
When you go onto https://www.splashmath.com/, click sign in. Afterwards, click class. It will then ask for a class code.
Our class code is: UGHUWG. Students then choose their profile and they all know their passwords.