You can Share VPN One Click subscription iPad/iPod/iphone subscription with your iPad/iPod/iphone.
All you need to do is login to VPN One Click app using the same Apple ID (used for the purchase) and tap “Restore Purchases”.
You cannot share your Mac subscription with your iPad/iPod/iphone.
You cannot share your iPad/iPod/iphone subscription with your Mac
The lifetime subscription cannot be shared, only shifted between devices. The standard subscription can be shared between some devices.