Hi everyone! I'm new to GrowthBook. As I understand, any client (for example, an iOS app) downloads all information about features and checks all conditions for each feature to get its value. To do this, the client should have all user attributes for the conditions. Is it correct? If so, how to use GrowthBook if a client has only a userID?

that’s correct

I want to conduct a/b testing, but the main feature is feature-toggling with segmentation by different user attributes. Percentage rollout is also needed. Shortly, I need all GrowthBook features)

percentage rollouts can also use that userID

Seems like we can make a backend service that calculates all values for feature-toggles and provides them to the app. Or is there a better way?

ya, that’s a good way

Cool, thank you!