I keep auto updates in Google Play on to make sure apps on my phone are always up to date. A few days ago I rooted my phone, which resulted in a factory format. After I re-installed all the apps I had before, I noticed a few apps were a bit different, some looked different and some had new functions. None of those apps released new versions on that day. So now I'm wondering if update and re-installation will result in differences for android apps.