Today, if you wish to make a living, it's insufficient to simply have a job. You'll need at the least 2 or 3 different resources of income to make sure that you can 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 thinking about 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. Every single day how many active users keeps growing. Here are some numbers which will illustrate just how big the industry is now:

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

- In accordance with statistics there were nearly 35 million iPhone developers by December 2010 ( source ). This figure shows an increase of 25% over the prior year's figures!

If you intend to develop mobile apps then you'll need several things before you can start. This is true of any type of development, but you especially need these:

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

- Some type of computer – Of course! Ideally it should be a laptop/netbook that runs Windows or Mac OSX since most computers nowadays run one of these simple operating systems. However, if your skills are adequate then you might be able to develop an application on Linux as well.

- A smartphone – It's not necessary 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 could always make use of a friend's or a household member's device.

- An IDE – A software development kit (or IDE - Integrated Development Environment) is essential to create applications for Deniz Güney Entrepreneur 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 want to publish them on app stores then you'll need to pay for the annual fee that will be 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.