iPhone apps are becoming more popular than ever before. Thus, the market is full of a diverse array of apps that are meant to give people entertainment and meant to make their day to day lives that much easier. Though there is no exact science to what makes an iPhone app successful or popular, there are some common denominators. If the app fills a need or a gap in the market, if it is publicized in as many places at once, and if the app's design is purposeful, the app is then more likely to be a top seller.

The first thing to consider is that for anything to sell well it has to fulfill a need that is not being met. Thus, you need to find a gap in the market. Is there something that is not being offered that should be offered? Think about day to day needs when thinking about top selling iPhone apps. Additionally, if the app is meant to be one of entertainment, it helps if there is nothing like it currently offered in the market. The more original an idea is, the less competition there will be and the more likely it is that a person will want to try it.

Once the app has been brainstormed, it is all about the marketing. The more publicity an app has, the more likely it is that people will want to try it and will either use it on a friend‚s iPhone or will test it for themselves. Thus, you want people to believe that an iPhone app is the best thing since sliced bread. To do this, it helps to advertise the app in all possible places: everywhere from blogs to forums to traditional newspapers and magazines. The more exposure an app has, the more likely it is that people will recognize it. Once an iPhone app gains name recognition, it can then start to build a buzz around it. The more people like an app, the more they will talk about it and the more it will be sold.

Lastly, you need to make the design of the iPhone app fit the tone of the app's purpose. Thus, if you are offering someone an app that will make their professional work lives that much easier, you want the app to be clean and streamlined. If you are trying to reference old school video games to give your users a release, then you might want to go with more pixilated or old school type graphics and designs. The app's design, no matter its style or look, should be something that can be clearly seen on the iPhone. If it is too big or complex, it might irritate users. Thus, you want an app that is as fun or productive as it is easy to understand and use.

If you consider the characteristics of a top selling iPhone app, you will see that the idea, marketing, and design are major factors in profitability. Supply and demand is in effect, and if an idea is unique enough, fills a need, and is fun and easy to use, it is bound to sell well.