Thank you for purchasing Kurviger Pro, you can keep using it in the future.
We will maintain and update it for you, so that it runs on the new Androids.
Kurviger 2 is a separate app with extra features as subscription (with free trial).
(all new features apply to Kurviger 2)
Please see the above announcement for more details.
A comparison / overview of Kurviger features exists in documentation.