Trojan virus

Scam. Ignore it. Remote websites cannot scan your device storage for malware. If they could scan for malware, the scammers would just steal all our data directly and wouldn’t bother trying to scam us.

There are lots of these scams, of various sorts, seeking various information or access from us.

Scam Pop-ups, Scam Viruses, Scam Receipts… - Apple Community

There is however a very persistent and quite incorrect belief that iPhone either cannot get malware (false, iPhone can get malware) or must be jailbroken to get malware (more likely to get malware, but not a requirement. iPhone can get malware and there does exist malware for iPhone, but it’s fairly rarely in circulation. And in this case, it’s “just” another pop-up advertisement that’s lying to its readers (us). Keep your devices patched to current, etc.

suna225 wrote:

I received this pop up from a webpage. Downloaded the app then deleted after it asked for money. What do I do now?

Stop believing advertisers.

Whatever has happened to your data—if that app accessed anything else or uploaded anything—due to that downloaded app has already happened. Nothing you csn do about that.

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

It's not legit, it is a scam.

I hope you haven't clicked any associated links.

How did the alert arrive? Webpage? Calendar alert? Email?

I received this pop up from a webpage. Downloaded the app then deleted after it asked for money. What do I do now?

A non-jailbroken phone cannot get a virus. Those would be scam messages. Ignore them.