As an educational app reviewer with a four-year-old who was born a month before the debut of the iPad, I can verify that Learn with Homer is among the best apps available that teaches foundational reading.
Big, emotional battles over policies like the Common Core can dominate the conversation. They flare up, for a time, then burn out, replaced by the next big, emotional policy battle. We say, don't think so much about the headlines. Do your homework.