Building cross-platform mobile applications using Couchbase and Ionic Framework is a popular topic, with existing step-by-step guides on creating hybrid apps that synchronize data between iOS and Android. Although the specific project results are not shown in the series, a video demonstrates the ease and effectiveness of integrating Couchbase into Ionic Framework development. By utilizing JavaScript, CSS, and HTML, developers can leverage Ionic Framework, based on Apache Cordova, to create visually appealing apps that sync with Couchbase and are deployable across platforms with a single codebase.