A Mobile Feature Flag Expiry Playbook

Feature flags are powerful in mobile teams. They allow staged exposure without waiting for another app-store review and make experimentation easier. But the long-term risk is that temporary flags quietly become permanent branches. In practice, expiry policy matters more than creation speed.

What to define when a flag is created

• expiry target date
• owning team
• removal condition
• minimum supported app version

Without those fields, flags stop being temporary controls and start becoming hidden architecture.

Why mobile is harder

Old app versions stay active longer, and release cycles are less immediate than server deployments. That means retirement decisions must account for version distribution, not just whether the server-side switch can be turned off.

Conclusion

Strong flag discipline is not about running more experiments. It is about cleaning them up fast once they are done. Mobile codebases stay healthier when flag lifecycle is treated as part of release management.

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