What is the programming language used to develop apps like Snapchat and Instagram?

From what i have observed the following contributes to the development of these websites such as Snapchat and Instagram

• Java
• Java Script
• PHP (Such as Facebook)
• Ruby
• Objective-C for apple products - (uber, instagram and snapchat)
• C programming
• Swift

I think  Mr Stanley Zimbizi has the correct answer. 

JAVA

All Android apps programmed by JAVA

iOS apps programmed by Objective-C which become Swift.

1- Objective C

2- C Programming

3- Java Script

4-  PHP

5- Swift

bropbelty  java or  c sharp 

php and java script are the ,most programming languages which used in |" java and snap shot .

Can U B more specific please , when u say apps do u mean android apps or the web app !BTW how does it come that most of the questions on Bayt.com specialties is asked by Bayt.com employees, like yourself !

It's either that u guys are the most curious people , or that u r trying to revive the site !

Best regards

From my experience, these are heavy social and chat interactive apps.

We can use the following languages. 

Erlang - for Chat Java - API Objective-C, Swift - for iOS app Android SDK, Kootlin - for Android app JavaScript - for pushing data Node JS - for Server Redis - for caching user-specific dataFirebase, Mixpanel - for Analytics, tracking 

I think it's (Java Script) or maybe (Baython).

I fully agree with the answers been added by EXPERTS........THANKS.