We have 5 years of work experience in this sphere. We are able to build hybrid applications as well as native ones. Technologies we use: IOS: Objective-C/Swift, RESTKIT (JSON), XML, Cocoa Touch and all standard iOS Kits. Android: OOP, Fragments, Interfaces, AsyncTask, SQLite, JSON, XML, Google maps API, GPS, Google Play Market. Backend: Node.js, Socket.io, WEB server, Jenkins, Gitlab, SOAP, MongoDB. DB: MySql, MSSQLExpress, SQLite. FrontEnd: HTML5, CSS, JavaScript, BootStrap, PHP, Node.JS. Credit Cards and Payments integration (PayPal, LiqPay).