No, you don't need an Apple computer to install an IPA anymore than you need a computer to install an APK. Let's stop comparing Apples and Oranges shall we? You need a computer to compile and sign an IPA, the same thing you need to compile and sign an APK.
> You need a computer to compile and sign an IPA, the same thing you need to compile and sign an APK.
You can compile and sign (and, AFAIK, upload to the Google Play Store) an APK on an Android device, using AIDE and perhaps other dev toolkits. No computer needed.