With the rise of more mobile applications, the need and demand for Mobile App Developers is also on the rise. Now app developers have the challenge of building a single game in multiple platforms. By using the multi-platform app tools, developers can provide services to various customers as well as clients. One of the prime aspects what the developer needs to remember is- regarding the platform for which the apps will be developed. The developer needs to decide if they want to build the single app for various platforms like iOS, Android, BlackBerry, or Windows. When an app is developed for cross platform, the developer needs to choose a specific program or utilize a third party tool that can generate code for cross platform at the same time. Most Experts suggest that by utilizing a Multi-platform tool, the developer can generate code for multi-platforms can help the developer save their time and efforts to great extent. To determine on the multi-platform tool, the app developer can analyze which is suited for the app development process PhoneGap and Air are two most popular Cross platform tools that has been suggested by Experts.