Mobile Feature Flags and Progressive Rollouts Questions

Design and operate feature flag systems and progressive rollout strategies specifically for mobile applications. Topics include client side and server side flag architectures, remote configuration, local fallback values, safe default behavior, and the trade offs between compile time and runtime flag evaluation. Evaluate rollout strategies such as percentage based rollouts, cohort based gating, staged deployments, and the use of feature flags for experimentation and split testing. Instrument releases with metrics and monitoring to detect regressions quickly and to support safe rollback. Account for offline behavior and cached flag values, long lived application versions, data privacy and security, and the performance impact of flag evaluation in the client.