Guide
How to Redesign a UI Without Losing Usability: A Case Study on Modernizing a Legacy App
Redesigning a legacy app UI can improve usability and adoption, but many efforts fail due to avoidable mistakes. Common pitfalls include starting without clear business and user goals, prioritizing visual trends over real workflows, and skipping user research or usability testing. Teams often underestimate the complexity of legacy systems, leading to performance issues or broken functionality after redesign. Over-customized interfaces and inconsistent design patterns reduce maintainability, while ignoring accessibility standards limits inclusivity and increases risk. Poor change management—such as insufficient user training or stakeholder alignment—can also hinder adoption. Successful legacy UI redesigns focus on user needs, iterative testing, performance optimization, accessibility, and p
