Here you can see the version of app
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After click on update if update are available than app is update
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After download update you can see below pop-up message.
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You get a pop-up for your version that has been downloaded. Restart the application to apply the updates. And now click on the restart button your app will be installed. Once integrated you can see that the your application version is updated with the latest version.
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If no updates are available then no messages are displayed.