This talk will delve into the trend of migrating traditionally desktop-bound software onto online platforms and navigate the challenges and opportunities that this shift presents for UX designers. Attendees will gain insights into the distinctive personas of desktop and web apps and learn about the best practices exemplified by pioneer products. The discussion extends to the challenge faced by some complex softwares and the creative solutions, and illuminates the advantages brought by the nimble and flexible nature of the web apps, positioning them as ideal platforms for collaboration, innovation, and integration of advanced technologies. Attendees will discover how UX designers play a pivotal role in crafting a seamless transition that not only preserves the essence of complex software, but also introduces delightful surprises to elevate the overall user experience.