Extramarks- Best Educational Apps iOS is the best online learning tool for class k-12. It is widely used by students all across India. With this app, you’ll never be bored, Our modules are interesting, fetching and Entertainment, but they secure exalted sightedness along with recondite exam preparation. App link - https://itunes.apple.com/in/app/extramarks-the-learning-app/id1232323918?mt=8