diff --git a/package.json b/package.json
index 5ba48af..3256c8b 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,8 @@
     "@xuqm/rn-im": ">=0.2.0",
     "@xuqm/rn-push": ">=0.2.0",
     "@xuqm/rn-update": ">=0.2.0",
-    "@xuqm/rn-xwebview": ">=0.2.0"
+    "@xuqm/rn-xwebview": ">=0.2.0",
+    "@xuqm/rn-license": ">=0.2.0"
   },
   "devDependencies": {
     "typescript": "^5.9.3",
diff --git a/packages/license/package.json b/packages/license/package.json
new file mode 100644
index 0000000..2f33336
--- /dev/null
+++ b/packages/license/package.json
@@ -0,0 +1,26 @@
+{
+  "name": "@xuqm/rn-license",
+  "version": "0.2.0",
+  "description": "XuqmGroup RN SDK — License module (device registration & verification)",
+  "license": "UNLICENSED",
+  "main": "src/index.ts",
+  "react-native": "src/index.ts",
+  "types": "src/index.ts",
+  "private": false,
+  "publishConfig": {
+    "registry": "https://nexus.xuqinmin.com/repository/npm-hosted/"
+  },
+  "scripts": { "typecheck": "tsc --noEmit" },
+  "dependencies": {
+    "@xuqm/rn-common": ">=0.2.2"
+  },
+  "peerDependencies": {
+    "react-native": ">=0.76.0",
+    "@react-native-async-storage/async-storage": ">=1.21.0",
+    "react-native-quick-crypto": ">=0.7.0"
+  },
+  "devDependencies": {
+    "typescript": "^5.9.3",
+    "@types/react-native": "^0.73.0"
+  }
+}
diff --git a/packages/license/src/crypto.ts b/packages/license/src/crypto.ts
new file mode 100644
index 0000000..35f615b
--- /dev/null
+++ b/packages/license/src/crypto.ts
@@ -0,0 +1,59 @@
+import type { LicenseFile } from './models'
+
+const MAGIC = 'XUQM-LICENSE-V1'
+const PASSPHRASE = 'xuqm-license-file-v1.2026.internal'
+const PBKDF2_ITERATIONS = 120_000
+
+// Accesses react-native-quick-crypto's SubtleCrypto implementation (peer dependency).
+// Avoids a top-level import so that tree-shaking works and missing dep throws at call-time.
+function getSubtle(): SubtleCrypto {
+  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  const qc = require('react-native-quick-crypto') as { subtle?: SubtleCrypto; default?: { subtle?: SubtleCrypto } }
+  const subtle = qc.subtle ?? qc.default?.subtle
+  if (!subtle) throw new Error('[XuqmLicense] react-native-quick-crypto not available')
+  return subtle
+}
+
+function base64UrlDecode(s: string): Uint8Array {
+  const padded = s.replace(/-/g, '+').replace(/_/g, '/') + '='.repeat((4 - (s.length % 4)) % 4)
+  // atob is available on Hermes (React Native 0.71+)
+  const binary = atob(padded)
+  return Uint8Array.from({ length: binary.length }, (_, i) => binary.charCodeAt(i))
+}
+
+async function deriveKey(salt: Uint8Array): Promise<CryptoKey> {
+  const subtle = getSubtle()
+  const passphraseKey = await subtle.importKey(
+    'raw',
+    new TextEncoder().encode(PASSPHRASE),
+    { name: 'PBKDF2' },
+    false,
+    ['deriveKey'],
+  )
+  return subtle.deriveKey(
+    { name: 'PBKDF2', salt, iterations: PBKDF2_ITERATIONS, hash: 'SHA-256' },
+    passphraseKey,
+    { name: 'AES-GCM', length: 256 },
+    false,
+    ['decrypt'],
+  )
+}
+
+// Decrypts license file content. Format: MAGIC.base64UrlSalt.base64UrlIV.base64UrlCiphertext
+// Ciphertext includes the 16-byte GCM tag appended (same as Android JCE output).
+export async function decryptLicenseFile(content: string): Promise<LicenseFile> {
+  const parts = content.trim().split('.')
+  if (parts.length !== 4 || parts[0] !== MAGIC) {
+    throw new Error('[XuqmLicense] Invalid license file format')
+  }
+  const salt = base64UrlDecode(parts[1])
+  const iv = base64UrlDecode(parts[2])
+  const ciphertext = base64UrlDecode(parts[3])
+
+  const key = await deriveKey(salt)
+  const subtle = getSubtle()
+  // Web Crypto AES-GCM decrypt expects ciphertext with tag appended — matches Android JCE output
+  const plainBuffer = await subtle.decrypt({ name: 'AES-GCM', iv }, key, ciphertext)
+  const json = new TextDecoder().decode(plainBuffer)
+  return JSON.parse(json) as LicenseFile
+}
diff --git a/packages/license/src/index.ts b/packages/license/src/index.ts
new file mode 100644
index 0000000..b74b48a
--- /dev/null
+++ b/packages/license/src/index.ts
@@ -0,0 +1,2 @@
+export { initialize, initializeFromFile, checkLicense, getStatus, getDeviceId, clear } from './license'
+export type { LicenseFile, LicenseUserInfo, LicenseStatus, LicenseResult } from './models'
diff --git a/packages/license/src/license.ts b/packages/license/src/license.ts
new file mode 100644
index 0000000..15fb245
--- /dev/null
+++ b/packages/license/src/license.ts
@@ -0,0 +1,141 @@
+import { Platform } from 'react-native'
+import { getDeviceId as getCommonDeviceId, getDeviceInfo } from '@xuqm/rn-common'
+import { decryptLicenseFile } from './crypto'
+import * as store from './store'
+import type { LicenseFile, LicenseResult, LicenseStatus, LicenseUserInfo, RegisterRequest, RegisterResponse, VerifyRequest, VerifyResponse } from './models'
+
+const DEFAULT_BASE_URL = 'https://auth.dev.xuqinmin.com'
+const CACHE_WINDOW_MS = 10 * 60 * 1000
+const STATUS_OK = 'ok'
+const STATUS_DENIED = 'denied'
+
+interface LicenseConfig {
+  appKey: string
+  baseUrl: string
+  deviceName?: string
+}
+
+let _config: LicenseConfig | null = null
+// In-memory cache to avoid repeated AsyncStorage reads within a session
+let _cachedStatus: string | null = null
+let _cachedStatusTime = 0
+
+function normalize(url: string): string {
+  const s = url.trim()
+  return s.endsWith('/') ? s : s + '/'
+}
+
+export function initialize(appKey: string, options: { baseUrl?: string; deviceName?: string } = {}): void {
+  _config = {
+    appKey,
+    baseUrl: normalize(options.baseUrl ?? DEFAULT_BASE_URL),
+    deviceName: options.deviceName,
+  }
+}
+
+// Auto-initialize from license file asset. The asset is embedded as a string (e.g., via react-native-raw-text or require()).
+export async function initializeFromFile(encryptedContent: string): Promise<void> {
+  const file = await decryptLicenseFile(encryptedContent)
+  initialize(file.appKey, { baseUrl: file.baseUrl })
+}
+
+export async function checkLicense(userInfo?: LicenseUserInfo): Promise<LicenseResult> {
+  if (!_config) return { type: 'error', message: 'LicenseSDK not initialized' }
+  const { appKey, baseUrl } = _config
+
+  // In-memory cache check
+  if (_cachedStatus === STATUS_OK && Date.now() - _cachedStatusTime < CACHE_WINDOW_MS) {
+    return { type: 'success', reason: 'Cached' }
+  }
+  // Persistent cache check
+  const persistedStatus = await store.getStatus()
+  const persistedTime = await store.getStatusTime()
+  if (persistedStatus === STATUS_OK && Date.now() - persistedTime < CACHE_WINDOW_MS) {
+    _cachedStatus = STATUS_OK
+    _cachedStatusTime = persistedTime
+    return { type: 'success', reason: 'Cached' }
+  }
+
+  const deviceId = await getOrCreateDeviceId()
+  const deviceInfo = await getDeviceInfo()
+
+  try {
+    const storedToken = await store.getToken()
+    if (storedToken) {
+      const verifyReq: VerifyRequest = { appKey, deviceId, token: storedToken, userInfo }
+      const verifyResp = await post<VerifyResponse>(`${baseUrl}api/license/verify`, verifyReq)
+      if (verifyResp.valid) {
+        await persistStatus(STATUS_OK)
+        return { type: 'success', reason: 'Verified' }
+      }
+      await store.setToken(null)
+    }
+
+    const regReq: RegisterRequest = {
+      appKey,
+      deviceId,
+      deviceName: _config.deviceName,
+      deviceModel: deviceInfo.model,
+      deviceVendor: Platform.OS === 'ios' ? 'Apple' : deviceInfo.brand,
+      osVersion: `${Platform.OS === 'ios' ? 'iOS' : 'Android'} ${deviceInfo.osVersion}`,
+      userInfo,
+    }
+    const regResp = await post<RegisterResponse>(`${baseUrl}api/license/register`, regReq)
+    if (regResp.success && regResp.token) {
+      await store.setToken(regResp.token)
+      await persistStatus(STATUS_OK)
+      return { type: 'success', reason: 'Registered' }
+    }
+    await persistStatus(STATUS_DENIED)
+    return { type: 'error', message: regResp.message ?? 'Registration denied' }
+  } catch (e) {
+    if (persistedStatus === STATUS_OK) return { type: 'success', reason: 'Offline - cached ok' }
+    return { type: 'error', message: e instanceof Error ? e.message : 'Network error' }
+  }
+}
+
+export async function getStatus(): Promise<LicenseStatus> {
+  const s = _cachedStatus ?? (await store.getStatus())
+  if (s === STATUS_OK) return 'ok'
+  if (s === STATUS_DENIED) return 'denied'
+  return 'unknown'
+}
+
+export async function getDeviceId(): Promise<string> {
+  return getOrCreateDeviceId()
+}
+
+export async function clear(): Promise<void> {
+  _cachedStatus = null
+  _cachedStatusTime = 0
+  await store.clearAll()
+}
+
+async function getOrCreateDeviceId(): Promise<string> {
+  const existing = await store.getDeviceId()
+  if (existing) return existing
+  const id = await getCommonDeviceId()
+  await store.setDeviceId(id)
+  return id
+}
+
+async function persistStatus(status: string): Promise<void> {
+  const now = Date.now()
+  _cachedStatus = status
+  _cachedStatusTime = now
+  await Promise.all([store.setStatus(status), store.setStatusTime(now)])
+}
+
+async function post<T>(url: string, body: unknown): Promise<T> {
+  const res = await fetch(url, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(body),
+  })
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({ message: res.statusText })) as { message?: string }
+    throw new Error(err.message ?? `HTTP ${res.status}`)
+  }
+  const json = await res.json() as { data?: T }
+  return (json.data ?? json) as T
+}
diff --git a/packages/license/src/models.ts b/packages/license/src/models.ts
new file mode 100644
index 0000000..6aa3ca9
--- /dev/null
+++ b/packages/license/src/models.ts
@@ -0,0 +1,49 @@
+export interface LicenseFile {
+  appKey: string
+  appName?: string
+  companyName?: string
+  baseUrl?: string
+  issuedAt?: string
+  expiresAt?: string
+}
+
+export interface LicenseUserInfo {
+  userId?: string
+  name?: string
+  email?: string
+  phone?: string
+}
+
+export interface RegisterRequest {
+  appKey: string
+  deviceId: string
+  deviceName?: string
+  deviceModel: string
+  deviceVendor: string
+  osVersion: string
+  userInfo?: LicenseUserInfo
+}
+
+export interface VerifyRequest {
+  appKey: string
+  deviceId: string
+  token: string
+  userInfo?: LicenseUserInfo
+}
+
+export interface RegisterResponse {
+  success: boolean
+  token?: string
+  message?: string
+}
+
+export interface VerifyResponse {
+  valid: boolean
+  error?: string
+}
+
+export type LicenseStatus = 'ok' | 'denied' | 'unknown'
+
+export type LicenseResult =
+  | { type: 'success'; reason: string }
+  | { type: 'error'; message: string }
diff --git a/packages/license/src/store.ts b/packages/license/src/store.ts
new file mode 100644
index 0000000..c9ac962
--- /dev/null
+++ b/packages/license/src/store.ts
@@ -0,0 +1,54 @@
+import AsyncStorage from '@react-native-async-storage/async-storage'
+
+const KEY_TOKEN = '@xuqm:license:token'
+const KEY_DEVICE_ID = '@xuqm:license:deviceId'
+const KEY_STATUS = '@xuqm:license:status'
+const KEY_STATUS_TIME = '@xuqm:license:statusTime'
+const KEY_APP_KEY = '@xuqm:license:appKey'
+
+export async function getToken(): Promise<string | null> {
+  return AsyncStorage.getItem(KEY_TOKEN)
+}
+
+export async function setToken(token: string | null): Promise<void> {
+  if (token == null) { await AsyncStorage.removeItem(KEY_TOKEN); return }
+  await AsyncStorage.setItem(KEY_TOKEN, token)
+}
+
+export async function getDeviceId(): Promise<string | null> {
+  return AsyncStorage.getItem(KEY_DEVICE_ID)
+}
+
+export async function setDeviceId(id: string): Promise<void> {
+  await AsyncStorage.setItem(KEY_DEVICE_ID, id)
+}
+
+export async function getStatus(): Promise<string | null> {
+  return AsyncStorage.getItem(KEY_STATUS)
+}
+
+export async function setStatus(status: string | null): Promise<void> {
+  if (status == null) { await AsyncStorage.removeItem(KEY_STATUS); return }
+  await AsyncStorage.setItem(KEY_STATUS, status)
+}
+
+export async function getStatusTime(): Promise<number> {
+  const v = await AsyncStorage.getItem(KEY_STATUS_TIME)
+  return v ? Number(v) : 0
+}
+
+export async function setStatusTime(ms: number): Promise<void> {
+  await AsyncStorage.setItem(KEY_STATUS_TIME, String(ms))
+}
+
+export async function getStoredAppKey(): Promise<string | null> {
+  return AsyncStorage.getItem(KEY_APP_KEY)
+}
+
+export async function setStoredAppKey(appKey: string): Promise<void> {
+  await AsyncStorage.setItem(KEY_APP_KEY, appKey)
+}
+
+export async function clearAll(): Promise<void> {
+  await AsyncStorage.multiRemove([KEY_TOKEN, KEY_DEVICE_ID, KEY_STATUS, KEY_STATUS_TIME, KEY_APP_KEY])
+}