Sorry If it's the wrong section So I am trying to do an app but it's not going to Google play/ AppStore yet, it Will be available on a blog/site. Is there a way to do auto-updates or update warnings? (I would prefer the auto updates) Also, is there a way to count the number of downloads? Or I need to do that on the site?
If you're not going to use a delivery platform with built in auto-updates, you'll have to either build that yourself or find another 3rd party option. Update warnings are considerably easier, and can be implemented in a number of ways. You could have your build access a webserver to check the current version, use one of the available networking API's to do something similar, or use the fairly new Remote Settings feature. https://docs.unity3d.com/Manual/UnityAnalyticsRemoteSettings.html Tracking downloads would have to be implemented on your webserver. You could track installs or game launches by having your build phone home to your webserver or again using a networking API.