Mobile app development is not rocket science in today's day and age. Making a good mobile application, however, is a process that requires a very lengthy pre-planning process. It could be as simple as launching the IDE, putting a few items together, doing a quick round of screening, and uploading it to an App Store, all achieved in half a day's work, to create your mobile application. Or you can render it a deeply engaged process involving comprehensive up-front design, QA testing on a range of platforms, accessibility testing, a complete beta lifecycle, and then various forms of deploying it. Your vision is given form by the direction you chose.