The Apple corporation levels the playing field when it comes to companies of any size as well as individual people to develop iPhone apps in an affordable fashion. Even though Apple makes it easy for you to submit your apps, there competition is steep and just because the app is put in the App Store does not mean you are going to be a success at selling it. If you want your app to be noticed you are going to have to market it as well. In order to do this, you will need to create a good marketing campaign using different and popular free social media websites.
The first thing that you want to do in order to market your app is to come up with a good message about it. A good campaign will spread only if people can connect with the content of your promotion and the app. It will need to talk to what motivates them and yet it still needs to be easy enough for them to share with others. Make sure that your message is consistent and means the same everywhere you might post it.
You will need to join a variety of different networking sites. Doing this is not going to cost you a single penny to do. All social networks and the pages and profiles that they offer are free to set up. You will then need to create some sort of online identity for you as well as your new iPhone app. You don't want to go with the direct sell marketing routine. It's not about that. What you need to do is to try to develop for yourself some sort of fan base that contains personal interaction between you and your audience that you are trying to target.
Also, don't just stick with the big name social networks. Reach out further and join some of the smaller sites. For instance if your app might have something to do with sports, you might want to join a smaller network that pertains to sports and the fans of those sports. If you happen to have an app that might appeal to mothers then join a site that deals with working moms and non-working moms. This way you can target a more specific group of people and if they like what you have to offer, they will pass the word on to others that they know.
Don't just stick with networking sites either. Feel free to also reach out to the many different bloggers there are online. There are a lot of bloggers out there that have a lot of influence over certain crowds of people and if you find bloggers that write about things that are relevant to your app, these are the ones you need to be in touch with. You might even get the bloggers to make reviews of your app so that it might influence their readers to go out and try it.
You should also consider using the many different social bookmarking sites that are out there. This will help you get more mileage so to speak out of your marketing content. By using social bookmarking sites your information is going to be spread to websites, blogs and social networks all at once.
Another thing you might do is to hold some sort of contest through Twitter or whatever social network you might belong to. No one can resist a free give away. You can set up a quick trivia contest or even one where the first five people that contact you will get a free copy of your app. If they like the app, the word will spread.