As a developer, learning how to build mobile apps that work both online and offline is an essential skill that can greatly enhance your app's functionality and user experience. Couchbase Mobile provides a solution for this by making it easy to develop such apps with its APIs. To get started, a mini-hack challenge has been created which allows developers to quickly explore development with Couchbase Mobile using Objective-C, Swift, or Java in under 30 minutes. The challenge comes with step-by-step instructions and the chance to win an awesome prize, including a MAKERBOT REPLICATOR MINI, for completing it and sharing their experience.