When it comes to Instagram, it was never said, that it is fully developed using React Native . Some parts of the UI are probably rendered with React Native, but without looking at the source code there is no way to say which, as React Native gives fully native results when it comes to user interface.
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Developer velocity is a defining value of Instagram’s mobile engineering. In early 2016, we started exploring using React Native to allow product teams to ship features faster through code sharing and higher iteration speeds, using tools like Live Reload and Hot Reloading that eliminate compile-install cycles.6 Şub 2017
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