Firebase Remote Config

Firebase Remote Config is a cloud service for managing app configuration without releasing updates. Store parameters (flags, settings, text) in cloud. Apps fetch config at startup and periodically. Change value, apps see it on next config fetch (no App Store submission needed). Examples: toggle feature on/off, run A/B test (variant A vs B), show promotional text, adjust difficulty level. Remote Config integrates with Firebase Analytics, so you can measure impact of config changes on user behavior (retention, revenue).