Maybe their app is taping on some Cordova API that is not available for the web. The only platform exposing similar APIs for hosted pages is Firefox OS and eve

Maybe their app is taping on some Cordova API that is not available for the web. The only platform exposing similar APIs for hosted pages is Firefox OS and even so it doesn't expose sensitive APIs to hosted apps. There is another issue with hosted apps which is the discoverability of such apps. People on iOS tend to believe that things need to be on the App Store...