What is needed for the first application (ios / android)?

Question

C++ / C#

What do I have:

• Experience with SQL Server (EF6, SQL, C#)
  
• relative knowledge of html, css
  
• how to work with api you can peep on the Internet
  
• Strong knowledge of C# and OOP fundamentals
  

Summer passes and the idea came to write an application on ios / android, but there is no experience in developing mobile applications at all. The essence of the application: the program helps the user to assemble a computer from components available on the market (api). I don’t know how to store data for mobile applications in general, how to properly organize a database or organize an assembly purely on api, I really need advice or consultation. Where to begin ?

Answer 1

1) Xamarin.Forms for developing UI and business logic in C# for both platforms at once;
2) OSX for building and deploying application builds for iOS (any MacBook will do) and preferably an iPhone;
3) Skills in WPF for UI layout;
4) Skills in SQL to work with SQLite;
5) Visual Studio for Windows or OSX;
6) Documentation for Xamarin, Android SDK and iOS SDK;
7) Direct hands, the desire to learn technology and the presentation of the final result.

Answer 2

Start by learning for Android Java for iOS Objective C. When you learn, come.