Hi Hopmere,
At the moment, SecureLine has a 1 license to 1 device model. It is possible to buy licenses for Android and iOS in the cart before checkout.
We are also working on a cross-platform license model which would allow a single license to be used across all the platforms you mentioned. That is still a few months away, so until then the above-mentioned option is the way to go.
Best regards,
Davidek