If I want to creat an app like WhatsApp what curse should I take

Question

self development

Answer 1

HTML, CSS, Javascript, PHP, SQL
Maybe Python instead of PHP.
For iOS apps you'll need Swift.

Answer 2

AKHATOR Blessed Whatsapp is primarily written in Erlang
read more about Erlang at
https://www.erlang.org/

Answer 3

If it is an app to be installed on Android, Kotlin is your start point

Answer 4

I think that a faster way will be with Dart in framework Flutter.

Answer 5

Thank you