Apps can turn your smartphone or tablet into a learning tool, an entertainment system, or a way to dig up almost anything you want to know. This guide makes finding the best apps for the task (and your kids' needs) easy. Whether you want to learn the ABCs, edit a video, or stay organized, we've got top-rated apps for your iOS device, Android device, or Kindle. Just look up your platform and your kid's age group; you can even click to download. Many have been rated for learning potential, giving your device -- and your kid's screen time -- an extra dose of enrichment.