Thank you for contacting us.
Lifetime plan means you’ll always get bug fixes updates for free, regardless of that specific update includes an exclusive new feature or not. No need to worry about that. The same thing goes to supporting newer iOS - we will always support the newest version while dropping support for very old iOS versions.
As for iPadOS - soon we will start working on adjusting uMake to iPadOS. If you’re currently using iPadOS, uMake should work, but if there any bugs/crashes, you would have to wait patiently when we will release the update that supports iPadOS, once iPadOS will be officially released to the public by Apple.
Let me know if that answers your question.