This free app from MasteryConnect is designed to be a reference for students, parents, and teachers to read and understand the Common Core Standards. You can find standards by subject, grade, and subject category (domain/cluster). This app includes Math standards K-12 and Language Arts standards K-12. Math standards include both traditional and integrated pathways (as outlined in Appendix A of the Common Core) and synthesizes Language Arts standards with the Corresponding College and Career Readiness Standards (CCR’s).
https://itunes.apple.com/us/app/common-core-standards/id439424555?mt=8