Developing an iOS Application requires complete ideation to execution exercise. Thereby you need to:
Define & detail what needs to be done. Bring down the idea on paper.
Contact leading app development agency like CMARIX to receive no-obligation consultation
Receive the time and cost of the turnkey execution which includes Designing an app, development, quality assurance, deployment as well as ongoing maintenance and support.
Make selection and give the order
You can read extensively on several areas of App development on CMARIX Blog
To get inspiration of App Design concepts, you can refer to CMARIX Dribble