how to know if my iPhone or Mac is hacked ?

iOS / iPadOS devices cannot be hacked or infected with Virus / Malware / Spyware, unless you have intentionally downloaded spurious softwares or unauthorised apps directly from internet and installed on your device or/and have Jail Broken.

Here is what you get when you own an Apple product: macOS - Security - Apple

Be careful when sharing the device's sensitive and valuable informations with friends and family members.

However --> If you think your Apple ID has been compromised - Apple ...

The software you're talking about is only useful to someone who already knows both your Apple ID and password. With it they can login to your account from even an Android phone and look through the data stored in your iCloud account.

The solution is to change your password to something much more difficult to guess. Also turn on two factor identification. You'll then be notified of any attempt to access your account, which you can then deny.

Please help me rather protecting Iphone.

Never allow it to be out of your control for any length of time.

Keep it up to date with iOS releases.

Do not let anybody sign in to your phone.

Shawn Aslam wrote:

There are so may softwares available to spy on the iPhone so anyone can do it through your iPhone.

That is absolute nonsense. Unless you have jailbroken your phone it cannot be hacked. If you aren’t willing to believe this then get rid of the phone immediately, as you will never feel comfortable using it.