Research Available Apps

Part of the app development process involves researching current apps on the market. Look into both successful and unpopular apps. Think about what makes an app successful. Look at the color schemes games like Angry Birds or Fruit Slice use. While I recommend you do your own research as well, here is what I have found:
Ads:
1. No ads if you are already charging for the app.
2. If the app is free costumers will accept some ads at the bottom of the screen.
3. If you have ads on your app make them small, NO FULL PAGE ADS. Users usually hate those and uninstall apps because of them. However, if you need a full page ad have it run right before the app begins to reduce frustration.
Colors:
1. No clashing colors.
2. Colors should follow a scheme. Blues and greens, pinks and reds, etc.
3. Colors should not be too dark or obnoxiously bright. Backgrounds can be dark, but there should be some lighter colors on the screen.
Marketing:
1. Make app be free initially to gain a reputation, then start charging for later downloads.
2. Make two versions of your app. A lesser one as the free version and a highly improved one for a fee. Users will initially download the free version and if they like it will pay to have the better version. Some people may only download the free version, but they are usually the type that doesn't pay for apps. (Remember you can still make money off the free app by having ads)
3. In some cases the sales of an app may actually increase with the cost of the app. Test what people are willing pay for your app.
4. Check to see of there is already an app like the one you are creating. The first app of a kinda is usually the one to corner the market. If there is already an app like the one you are developing, read the comments. Find out the issues with the app and make yours better.
5. Fix errors QUICKLY! Users don't like long load times, frozen screens, inconsistent apps, error messages, force close notices, etc. If you get reports of errors fix them fast before too many people comment that the app is defective. People will uninstall your app if they get annoyed with it. However, if you can fix problems fast, people will be more satisfied. Satisfied costumers leads to better reviews, more recommendations, and ultimately more downloads. The opposite will happen if errors go unfixed.
6. Update your app as often as possible. If you have ever downloaded a popular app you have probably noticed that the producer updates the app every so often. Now too many updates can get annoying, but if there are no updates users will get bored of your app fast. A routine flow of new features will keep people interested.