If you live on Australia's Gold Coast, have an idea for an app and need a local app development company to help you create it, any company you hire should be able to offer these things.
A solid portfolio of past projects -- Any company that is worth hiring for app development should have an extensive portfolio of past projects they have worked on. This would be even better if the projects include apps that are of a similar design to yours.
A team that does everything in-house -- Some app development companies on Australia's Gold Coast do some of the app development themselves, and then farm out the rest of it to other companies. Try to choose an app development firm that does not do this, as a company that creates everything in-house themselves is one that will likely have fewer problems before your app is finished.
A development company that creates a fixed deadline -- Some app development companies will come up with a deadline for when your app will be finished. Then, over time, that deadline will keep moving until your app ends up being months later.
Choose a development company that is known for creating end dates and then sticking to them, and you will have far less chance of hiring a firm that cannot finish your app on time.
A company that listens to your input -- Remember, you are the person that has had an idea for an app, and you are the person that will be selling that app under your name.
That is why you want to be absolutely sure the app development gold coast company you hire listens to your input, takes heed of your suggestions when it comes to changes and produces the type of app you actually want.