The first thing that needs to be answered is do you need an app, or will a website derive the same benefits for your business? If you answer this question, you would know if an app is useful for your business or not. In most cases, you would see that a mobile website is all that you need. But, in case you feel an app is essential for your business, the next question would be what do you want the app to do? The goals that you are aiming for need to be decided before you go ahead with app development. The defined goals and the business needs will help you define the app that you are planning for your business.