Flutter is the new kid around the block, and it came with a lot of new concepts and features. Before we dive into learning more about Flutter and why is claimed to be the best cross-platform solution, we need to take a step back and look at existing available solutions. Cross-platform frameworks allow developers to write one single codebase and run the same code on multiple platforms. Big names such as Adobe, Microsoft and Facebook have attempted to solve the problem of duplicate codebases on both the Android and iOS platform.