Sparrow is only available on desktops and not mobile phone.
This Jimmy believed he was downloading a genuine version of a Sparrow Wallet app for his iPhone from the App Store.
Scammers have known already that we mostly use Android on this forum and that we do always report them. Apple app store was not mostly used before but Android Play store. But after many reports and taking down of their scam apps, they moved to App store for Apple. This is the reason App store scam wallets are many now.
I am surprised that the application bypassed the security features of Apple in putting apps on the Appstore given the stringent regulations that they need to pass. Additionally, when downloading wallets from the App Store, it is heavily recommended to get feedback and reviews from trusted forums and people before putting that amount of money in a newly downloaded app.
Assuming arguendo that the application was overlooked by Apple, still, Jimmy must be vigilant enough to at least double to triple check everything for his own security and safety. Not putting the blame on him given that scammers are innovative in creating fake applications but with that amount of money, you should definitely be at your highest alert and security.