I have had Flight Radar 24 installed on my iPhones for many years. I wanted to install it on My Mac Studio. There is a Flight Radar 24 Mac App but it is not in the Apple App Store something I have to get used to. I recently upgraded the app to the Gold level. At first I opened it on the Mac from their Website and it did not reflect the upgrade from the Silver level. FR24's support was quick to help. Their suggestions did not help, it was the old not many Apple people call for support. As instructed I used the exact sign in credentials used on my iPhone with no joy. I was looking through the App on the iPhone page by page. In the sign in screen on the app it tells you need to set up the account on the Mac from the iOS App. It takes you through the steps. Here is the complication that threw me. Your iphone will setup a strong password for you, good, If you have it enabled it will also assign a secure eMail address that only works on that site. This is where it gets interesting. You cannot sign in with your regular eMail address you have to use the secure eMail address. The FR24 account on the Mac is the same but is has a different sigh in. The sign in info can be found in the Password section of the Settings App. Flight Radar 24 on the bigger Mac screen is pure eye candy. With the Gold Level it opens up even more interesting stuff.