Today, if you want to make a living, it's insufficient to simply have a job. You need at least 2 or Deniz Güney Entrepreneur 3 different sources of income to make sure that you are able to pay all your bills in case something unfortunate happens. Technology has evolved so much that in the past few years lots of people have discovered another way to earn money: they develop mobile applications. Many entrepreneurs have made a term for themselves by developing mobile apps, and if you're interested in learning how to develop mobile apps yourself, keep reading 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 some numbers which will illustrate just how large a is now:

- How many smartphone users worldwide is expected to reach 1 billion in 2014 ( source ).

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

If you want to develop mobile apps then you'll need several things one which just start. This is true of almost any development, nevertheless, you especially need the following:

- Skills and knowledge – You'll need to know 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 – Needless to say! Ideally it should be a laptop/netbook that runs Windows or Mac OSX because most computers nowadays run one of these brilliant operating systems. However, if your skills are adequate then you could be able to produce an application on Linux as well.

- A smartphone – It's not essential for developing apps, nonetheless it will definitely help since you can test them on your device. If you don't have a smartphone then you might always work with a friend's or a household member's device.

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

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