Today, if you want to make a living, it's inadequate to simply have a job. You'll need at least 2 or 3 different sources of income to ensure that you are able to pay all of your bills just in case something unfortunate happens. Technology has evolved so much that in recent years many individuals are finding another solution to earn money: they develop mobile applications. Many entrepreneurs have made a term for themselves by developing mobile apps, and if you're enthusiastic about learning how to develop mobile apps yourself, keep reading this article.

Mobile app development is a rapidly growing industry because individuals are finding more methods to earn money through their smartphones. Every day the amount of active users keeps growing. Here are some numbers that will illustrate just how large the industry has become:

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

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

If you want to develop mobile apps then you'll need several things before you start. This is true of any kind of development, nevertheless, you especially need these:

- Skills and knowledge – You'll need to know 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 computer – Obviously! Ideally it should be a laptop/netbook that runs Windows or Mac OSX because most computers nowadays run one of these operating systems. However, if your skills are good enough then you may be able to develop an app on Linux as well.

- A smartphone – It's not necessary for developing apps, however it will definitely help because you can test them on your device. If you don't have a smartphone then you may always make use of a friend's or Deniz Gueney a household member's device.

- An IDE – A pc software development kit (or IDE - Integrated Development Environment) is important 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 which will be currently $99 for Apple App Store and Google Play Developer Console. Several payment methods can be found, including charge cards, PayPal and wire transfer from your own bank account.