Do you want to try new iOS or android system, but you don’t have phone available with such system? You can try appetize.io
This website simulates a lot of iOS and Android versions. You can easily check the settings, start the apps etc.
You can also try some applications in this simulator. It’s easy. Upload a ZIP file containing your compressed .app bundle, Your .app bundle must represent a simulator build of your app. Appetize.io will create an iOS simulator and e-mail you the generated links. You can embed and share these to show off your product demo.
Visit https://appetize.io/ and try it.