3. PBS Kids
If you have young children, then PBS Kids is the place to be. Their app, which you can download on the Apple store, Windows, Google Play, or Amazon, features educational games and a lot of the great, wholesome shows you can find on PBS proper, like Daniel Tiger, Dinosaur Train, and Arthur. Plus, they're all available through pictures rather than names, so even if your kids can't read yet, they can figure out which one is Sesame Street and which one is Caillou.