Proof

react-native-mmkv-storage

native-seam: unchanged MMKVLoader/MMKVInstance JavaScript runs over MMKVStorage.install and the full iOS JSI globals, sharing persistent AES-CFB storage with native 16-byte key truncation and a separate raw generic-password keychain namespace

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—

Missing (2)

browser backing files differ from Tencent mmap accounting; keychain and iCloud security are simulatednot hardware protection