This article focuses on optimizing web interface rendering in large-scale mobile applications that serve billions of users. The study aims to identify how different architectural models—Native, Hybrid, and WebView-based—influence the trade-off between performance, user experience, and delivery agility. This work set out to build a practical way of choosing and improving mobile-app architectures, especially in projects that need constant updates and quick turnarounds, while still being able to scale globally—the methodology of this study is analytical and comparative, based on ten recent peer-reviewed research and sources. The analysis ascertained four themes: performance, user experience or “nativeness,” maintenance work, and how quickly updates can actually roll out. From what was observed, WebView setups often make releases faster and cheaper, though that gain usually costs a bit of raw speed. Hybrid frameworks like React Native or Flutter, meanwhile, come fairly close to native responsiveness and are not as taxing on day-to-day developer effort. The paper also highlights a few applied methods for boosting front-end responsiveness, managing bundles more cleanly, and strengthening offline reliability. The article will be useful to assist engineers and product managers with making releases more frequent while maintaining the same level of polish and reliability for users.

Mobile app architecture, WebView, Hybrid framework, Over-the-air updates, Progressive Web Apps (PWA), React Native, Flutter, Frontend optimization, Cross-platform development, Continuous delivery.

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