I found a big difference in application and app store support for older versions. You need to keep updating the iPhone to the newest version of iOS because if

I found a big difference in application and app store support for older versions. You need to keep updating the iPhone to the newest version of iOS because if you don't, all the apps will be undownloadable. When they stop updating it, it's toast. I had an Android Gingerbread (2.3) phone for a while when KitKat was out, and I had lots of software to download. Then I updated to one on Marshmallow (6.0) and it had plenty of software and probably still does. I'm not sure how much software is still available that works on Nougat (7.0.1) on the S6 all the way through Android 10, but I was really disappointed that I couldn't even keep the iPhone 4S alive as a toy because all the old software was gone. However, it's lame that Google drops security updates so early.