Proof

react-native-fast-secure-storage

native-seam only — upstream SecureStorage class and JSI install wrapper run from the bundle; FastSecureStorage.install mounts the __SecureStorage host object backed by the shared tenant key/value store

90%

API coverage

No visual proof cases have been published for this package yet. The registry summary below describes what the compat layer implements.

Working

setItem/getItem/clearStorage/setItems/getAllKeys/getAllItems/removeItem/hasItem plus sync get/set/remove/has operations

Missing

no real Keychain / EncryptedSharedPreferences encryption