<h2>1. We use some native toolkits for iOS App Development- </h2>
<strong>Apple Xcode </strong>(iOS):
Apple's integrated development environment provide many features to create mobile apps that can run on any iPhone or iPad. It is an open source project. It is free of cost. You can start working on it, you only need mac OS X. It also provide graphical editor to build user interface for apps easily.

<strong>IntelliJ AppCode </strong>(iOS): Intellij also provide a featured development environment that lets you develop mobile apps for ios platform on objective c language.App code comes with on the fly code analysis and debugging tool. App code available freely for trial version.after trial version,licensed copy will cost you just $89.
<h2>2. We use some native toolkits for Android App Development- </h2>
<strong>Android Developer Tools for Eclipse </strong>(Android):
Eclipse provide android development(ADT) plug in to development mobile application for android devices. Corrently its not fully supportable as there is new version of  IDE e.g. Studio available and  its ADT plugin is free.
<strong>Android Studio </strong>(Android):
It is advanced tool for developing mobile application.
Android Studio contains Gradle build support, Lint tools, Pro-Guard app-signing tools and template-based wizards for common application components. Android studio can be downloaded from Google developer site.
<h2>3. Adobe PhoneGap / Apache Cordova (cross-platform, hybrid):</h2>
Apace cordove is open source framework to build hybrid mobile application. It run html5/Javascript on mobile application. Native device functionality is exposed via JavaScript APIs and HTML based applications can access device specific features like sensors or camera. Phonegap uses cordova as core of this framework and developer build their apps via cloud  without installing its sdk. These are available free of cost.
