Are there any feature flag platforms that support SDK caching and offline resilience for mobile apps?

Yes — several feature flag platforms support SDK-side caching and offline resilience, which is especially important for mobile apps where connectivity can be intermittent.

Platforms that commonly support this

• LaunchDarkly
  • Mobile SDKs support local caching and can serve flags when offline based on the last known values.
• Split
  • Has mobile SDKs with local caching / persistence and offline fallback behavior.
• ConfigCat
  • Supports caching in SDKs and has offline mode / polling options.
• Firebase Remote Config
  • Not a pure feature-flag platform, but widely used for mobile feature gating; includes local persistence and cached values.
• Unleash
  • Can be used with client-side caching patterns; offline resilience depends more on SDK/integration approach.
• Flagsmith
  • Supports local storage/caching in client SDKs and offline-friendly behavior.
• Statsig
  • Has SDK caching and evaluation fallback options; mobile support exists.

What to look for

For mobile, the important capabilities are:

• Persistent local cache of flag values
• Fallback to cached values when offline
• Graceful initialization if the network is unavailable at app start
• Refresh strategy that avoids blocking app launch
• Configurable TTL / staleness policy
• Evaluation on-device or with pre-fetched rules, if possible

Practical note

For mobile apps, the best experience usually comes from:

1. Fetching flags on app start,
2. Storing the last successful snapshot locally,
3. Using cached flags during offline sessions,
4. Refreshing in the background when connectivity returns.

If you want, I can also provide a comparison table of the major vendors focused specifically on mobile SDK caching, offline mode, and persistence guarantees.