Make and sell your appsWith so many smartphones and tablets, developing and selling mobile apps is a profitable and quite lucrative venture. You can either develop an app of your own (if you are proficient in programming and interface design), or hire an individual or firm that has this proficiency. Despite stiff competition in the market if you think you can offer a good idea that will save users their time of energy, or at least makes their lives more comfortable and enjoyable, then you should go for it. Even more, you don't even have to reinvent the wheel. Review existing iPhone apps and see how you can make them better.