Lightroom version for iPad varies

[Lisa25513252y2dj]

My friend and I have the same version of Lightroom for iPad but have different functionalities. In the masking tool, she has select subject and select sky but I do not. Is this related to the age or model of the IPad?

[Charlie.D]

Hello @Lisa25513252y2dj 

Are you updated to the latest build v7.4.2?  

Incompatible devices are listed at the top of this FAQ: https://helpx.adobe.com/lightroom-cc/using/masking-mobile-ios.html