I tried using the native.showAlert API to have an alert popup in iOS.
When I use it with the simulator, I get a popup, but it’s not an iOS style popup. It looks like a Corona Simulator app popup of some sort.
When I run the app on a real device, will I get a regular iOS alert like when using UIAlertView in Xcode?
Yes, you will get a regular iOS style popup.
When you call alert it will appear in platform specific style. On windows it will be windows’ , on android android’s, on iphone iphone’s 
Generaly all native elements will be drawn using platform specific UI (activity indicators, alerts). Only xcode is exception because both it and iphone comes from apple and it will give you look as o device, where windows and android are two separate platforms.
Yes, you will get a regular iOS style popup.
When you call alert it will appear in platform specific style. On windows it will be windows’ , on android android’s, on iphone iphone’s
Generaly all native elements will be drawn using platform specific UI (activity indicators, alerts). Only xcode is exception because both it and iphone comes from apple and it will give you look as o device, where windows and android are two separate platforms.