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Progressive Web App is a set of technologies using to extend the possibilities of web-pages so that looks like native apps. Progressive web apps are fast, responsive, engaging, reliable, and more to the point, they combine the benefits of both mobile apps and web pages. PWA helps to solve engineers’ headaches related to cross-platform development and its further maintenance. People spend 9 times less in the browser than in mobile apps, according to comScore data, and users have no troubles using either app or web-page.