How to check if a user is online?

There are two ways to find out if a user is online:

1. Using our SDKs. Please check guides here:

iOS SDK - Advanced | Chat | iOS SDK | QuickBlox

Android SDK - Advanced | Chat | Android SDK | QuickBlox

JavaScript SDK - Advanced | Chat | JavaScript SDK | QuickBlox

2. Using Chat contact list 

iOS SDK - Advanced | Contact list | iOS SDK | QuickBlox

Android SDK -  Advanced | Contact list | Android SDK | QuickBlox

JavaScript SDK - Advanced | Contact list | JavaScript SDK | QuickBlox