MOBILE App development

I'm looking to develop a mobile application for both iOS and Android, focusing on Business use. It will be a language teaching course which will include features such as a payment gateway, geolocation and social media integration. The application must be user friendly, reliable and secure. It should also be visually appealing and interactive. In addition, clear and concise instructions should be provided for using the app. The goal is to create an amazing mobile application that will revolutionize the way people learn foreign languages.