Carrying on from an earlier post on Getting started with iOS App Development. Here are a few things to keep in mind while making mobile apps (or any software ).

1. Resources: It is up to you the developer to get the resources required for your app. By resources I mean all artwork, images, documents, audio files that may be required as a part of your app. These resources have to be your own & not borrowed from google. Basically, you should own the rights to the resources.
2. Marketing: Its a good idea to make your own app. But you also need to think about marketing. Come up with ways to spread the message about the app.
3. Feedback: This comes a little later in the app dev cycle. But it is equally important. Make sure you get as many family members & friends as possible to give you a straight & honest feedback about your app. This will help you make some quick fixes or introduce new features you didn’t think about earlier .
4. Devices: Once you are ready & satisfied with the simulations on the mac start testing the app on a real device. Depending on your app you may want to test on multiple devices with different versions of the OS installed on them. This can be handy if you want to target multiple devices & would like to cover maximum number of users. It could also be possible that the features you are using are not OS specific, in that case you may want to test your app on as many different versions as possible.
5. Branding: This could also fall under the marketing section. Think of a catchy name for your app. Something that would cause a casual browser of apps to look at your app in further detail.
6. Attention to detail: A very important point. Here is a link to an article I wrote about earlier. Attention to Details