There are a differentiating factor when you write an app for "jingles" and when you write an app for the "jiggles". In the former where money is concerned, time to deliver is of utmost importance. So you may have to cut some corners in terms of features; You might have to take the easiest route, one that works even if it might not be the best solution. However if you are writing an app for fun of it, then learning and doing it the right way should the main focus.