Hybrid apps are built in either connected or offline mode. This allows you to maintain two mobile device profiles; one for users that are always online and one for users with intermittent connectivity. The Developer Portal builds connected apps by default. Configuring a hybrid app to run in offline-enabled mode requires minor manual adjustments.
To build an offline version of your app you will need to customize the build package and send it to Phonegap Build yourself. Follow the steps to build an app package for either iOS or Android in Customizing PhoneGap Build packages. Download the build package and unzip it. In the build package, locate the file
index.html and open it in an editor. Find the line containing
var enableOffline = false;
and change it to
var enableOffline = true;
Now, zip the files again into a build package and upload it to PhoneGap Build.