How to autoupdate android app without playstore? Like Facebook app or any Contest app

Question

How do apps update internally automatically without updating from playstore? I mean the internal data of app is changed (via internet) without updating from playstore. For e

Answer 1

Also have a look on AppCenter (Former HockeyApp) in-app updates https://docs.microsoft.com/en-us/appcenter/distribution/inappupdates