Not working - at all.
iPhone 4s, 64gb. Downloaded, got to the 2nd loading screen, then it quit. Hard rebooted the phone, tried again, same result. I deleted the app, rebooted the phone again and redownloaded the app and tried yet again, no luck. Rebooted again, no luck. If I can get it to work, I would rate it higher. Yes, I have sent a support request to the devs.
Deckyon about
Agents of Interpol