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I'm finding it hard to make distinction between parameters related to first_open event. Those parameters are system_app, system_app_update and update_with_analytics.

Can someone clearly define them and give concrete examples when these parameters will change their values.

I'm following this link, but I couldn't get hold of these concepts.

I have understood previous_first_open_count though. If it's 0 then it's new install and if > 0 then re-install. Is it possible that previous_first_open_count = 0 AND update_with_analytics = 1. If Yes, how?

Muhammad Usman Haider
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Yes, it is possible.

update_with_analytics = 1 means that the user has updated from a previous version that did not have analytics integrated. previous_first_open_count can be 0 since there will be no existing first_open events for the previous version of the app that didn't have any analytics collection.

system_app indicates whether or not the app is a system app. System apps are the apps that are preloaded on the device (not installed by user).

Vesper
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    thanks for your wonderful answer. I have seen cases where **previous_first_open_count** > 0 AND **update_with_analytics** = 1. How this is possible? If old version was already linked with analytics then why **update_with_analytics = 1** was fired after upgrade? Or I'm missing something? – Muhammad Usman Haider Oct 11 '18 at 12:44
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    I have not researched this in depth but one possible scenario is that the user uninstalls the app/update and downgrades to a previous version of the app that does not have analytics and then gets a new version of the app at some point in the future. – Vesper Oct 16 '18 at 09:09