Once you are done with your App you can review it to make sure everything work as it should. You can:
• see how it looks on your dashboard preview on the right hand side
• test it directly onto your mobile device with the AppsBuilder Preview App, which you can download from the Apple Store and Google Play Marketplace
The links below will take you to the correspondent App Store:
iOS (iPhone/iPod and iPad): http://itunes.apple.com/us/app/appsbuilder-apps-preview/id508399509
Once you have the AppsBuilder Preview App on your phone, open it and insert your account or your app id (that you can get from your app's control panel).