Unique ideas are hard to come by in this competitive app market, and even if there is a unique app, chances are high that someone else will develop a similar app and let users get it for free.
Unless you have developed an app that has “paid and successful” written all over it, I feel that it is always better to keep mobile apps free for download. But I’m sure the biggest question on your mind right now is: “how can I make money from free mobile apps?” Fret not, dear developer… there are ways (and pretty effective ones) that can promise to generate ample revenue from your free mobile app.