Today, if you wish to make a living, it's not enough to simply have a job. You'll need at least 2 or 3 different sources of income to make sure that you are able to pay your entire bills just in case something unfortunate happens. Technology has evolved so much that in recent years many people have discovered another way to earn money: they develop mobile applications. Many entrepreneurs have made a term for themselves by developing mobile apps, Deniz Guney and if you're thinking about learning how to produce mobile apps yourself, keep looking over this article.

Mobile app development is just a rapidly growing industry because people are finding more ways to earn money through their smartphones. Everyday the amount of active users keeps growing. Here are a few numbers that may illustrate just how big a is becoming:

- The number of smartphone users worldwide is expected to reach 1 billion in 2014 ( source ).

- Based on statistics there have been nearly 35 million iPhone developers at the time of December 2010 ( source ). This figure shows a rise of 25% over the previous year's figures!

If you wish to develop mobile apps then you'll need several things one which just start. This is true of any type of development, however you especially need the next:

- Skills and knowledge – You'll need to find out just how to code, and you'll also should try to learn about design concepts like UX (User Experience) and HCI (Human Computer Interaction).

- A pc – Of course! Ideally it must be a laptop/netbook that runs Windows or Mac OSX since most computers nowadays run one of these operating systems. However, if your skills are adequate then you may be able to develop a software on Linux as well.

- A smartphone – It's not required for developing apps, but it will definitely help since you can test them directly on your device. If you don't have a smartphone then you may always make use of a friend's or a family group member's device.

- An IDE – A pc software development kit (or IDE - Integrated Development Environment) is necessary to produce applications for Android, iOS and Windows Phone platforms. Popular IDEs include Xcode , Eclipse and Visual Studio.

- The developer license – You are able to develop apps without paying anything, but if you intend to publish them on app stores then you'll need to cover the annual fee that will be currently $99 for Apple App Store and Google Play Developer Console. Several payment methods are available, including credit cards, PayPal and wire transfer from your own bank account.