The document introduces a digital tool called the Digital-App-Rewriter that can summarize apps from one platform to another up to 30 times faster and more accurately than manual rewriting. It analyzes the app structure and functionality and rebuilds it using an Abstract Semantics Tree. The rewriter interacts with an architect-operator in an IDE to suggest solutions while allowing human control. It can rearchitect monolithic apps to be multi-user for web, mobile and cloud with almost zero errors at a fraction of the cost and time of manual rewriting. The rewriter is a learning tool that applies existing rules and suggests new ones to continuously improve the rewriting process.