In order to install Delta emulator on your iOS phone, you need to have a desktop Mac or Windows computer nearby. First you must download and install the altserver program for Mac here(you can also use the download button above), or Windows here(beta). The altserver acts like a bridge and helps you install applications on your iPhone that are not on the official apple store.
When app has been downloaded, run it and it will ask for Apple ID and password. Mac Only:
If the login fails click on the Altserver in the upper right corner (on Mac) and click install mail plug-in. Than open your mail app and click mail->preferences->Manage Plug-ins enable AltPlugin.Mailbundle and "apply and restart" mail. After that run the program on Mac again and enter your credentials.
Move back on your phone and you will see a new app install called Altserver. Run the app, search for Delta emulator and install it. Happy gaming!