What is WhatsApp mobile app written in?

Somebody has to develop React Native itself. They need both, iOS and Android developers for that. they spend tens of millions of $ a year on it. might go away but probably won’t. Instagram mobile and web app are built based on a variety of technologies .

No, Messenger didn’t use React Native at the time it was rewritten . Again, this is a native app rewritten to a native app.

at FB says: “At Facebook, all of our apps using React native, use react native from the main branch ..”

# WhatsApp Developed as a native app for iOs and Android phones, WhatsApp is a commonly-used messaging service in many parts of the world. Noticeably, this platform was the fourth-most downloaded app globally in Q3 2020, with around 140 million times.

9 Amazing Mobile Apps Built with React Native

ErlangWhatsApp / Programlama dili

Although there were several betas before it was officially launched, the WhatsApp uses ReactJS for building user interfaces from Facebook, just like it uses Underscore. … As of recently, the all-new WhatsApp Web app has also been using React, just like the Facebook web experience mentioned above.18 Mar 2021