#Migration Guide

Migrating from react-native-device-info to react-native-nitro-device-info.

#Overview

react-native-nitro-device-info ships a drop-in compatibility layer that exposes the exact react-native-device-info (RNDI) API surface — same function names, same signatures, same default DeviceInfo object, same hooks. You import from react-native-nitro-device-info/compat instead of react-native-device-info, and your call sites stay unchanged.

There are two ways to migrate. Pick based on how much you want to change:

Start with the drop-in path. Move individual call sites to the native API later if you want the last bit of performance — the two can coexist.

#Drop-in Migration (recommended)

#1. Install

# Install the new library + its peer dependency
npm install react-native-nitro-device-info react-native-nitro-modules
# (or: yarn add react-native-nitro-device-info react-native-nitro-modules)

# iOS
cd ios && pod install && cd ..

#2. Run the codemod

The library bundles a codemod that rewrites every react-native-device-info import to react-native-nitro-device-info/compat. It only rewrites import specifiers — it never touches your call sites.

npx react-native-nitro-device-info migrate
# or target a specific directory:
npx react-native-nitro-device-info migrate src

It rewrites ES imports (default, named, namespace), re-exports, and CommonJS require():

// Before
import DeviceInfo from 'react-native-device-info';
import { getModel, useBatteryLevel } from 'react-native-device-info';

// After (rewritten automatically — call sites unchanged)
import DeviceInfo from 'react-native-nitro-device-info/compat';
import { getModel, useBatteryLevel } from 'react-native-nitro-device-info/compat';

Prefer to do it by hand? A project-wide find-and-replace of the import string 'react-native-device-info' → 'react-native-nitro-device-info/compat' achieves the same result.

#3. Remove the old dependency

npm uninstall react-native-device-info

#4. Review the documented caveats

The compat layer covers the entire RNDI API surface. A small number of APIs return placeholder values because they have no native equivalent in this library — see Compat Layer Caveats below. If your app doesn't use those APIs, you're done.

That's it — no call sites to change, no await to add or remove.

#Compat Layer Caveats

The compat layer is signature-compatible across the whole RNDI surface, with these documented exceptions:

Everything else maps to a real value. A few APIs differ in shape but are transparently converted for you (e.g. getAvailableLocationProviders() returns RNDI's { gps: true, network: true } map, getFreeDiskStorage(storageType?) accepts and ignores the iOS storage-type argument, and the async accessory hooks return RNDI's { loading, result } shape).

#Native Migration (optional, for maximum performance)

If you want direct property access and synchronous getters instead of the compat shims, import DeviceInfoModule from the package root and rewrite call sites using the tables below.

#Key Differences

Architecture

• react-native-device-info: TurboModule / Bridge (JSON serialization)
• react-native-nitro-device-info: Nitro HybridObject (JSI, zero overhead)

Properties vs methods — most RNDI methods become direct property accessors:

// react-native-device-info        // native API
const deviceId = DeviceInfo.getDeviceId();   const deviceId = DeviceInfoModule.deviceId;
const brand = DeviceInfo.getBrand();         const brand = DeviceInfoModule.brand;

Synchronous by default — values that were async in RNDI are now sync:

const uniqueId = DeviceInfoModule.uniqueId;            // sync property
const totalMemory = DeviceInfoModule.totalMemory;       // sync property
const batteryLevel = DeviceInfoModule.getBatteryLevel(); // sync method
const isTablet = DeviceInfoModule.isTablet;             // sync property

Only I/O operations stay async:

const ipAddress = await DeviceInfoModule.getIpAddress();
const carrier = await DeviceInfoModule.getCarrier();
const installTime = await DeviceInfoModule.getFirstInstallTime();

#Quick Migration Reference

#Device Information

#System Resources

#Battery Information

#Application Metadata

#Network & Connectivity

#Step-by-Step (native path)

These steps assume you want the native API. For the zero-change path, use Drop-in Migration instead.

#1. Install the New Library

# Remove old library
npm uninstall react-native-device-info

# Install new library
npm install react-native-nitro-device-info react-native-nitro-modules

# iOS
cd ios && pod install && cd ..

#2. Update Imports

Find and replace imports across your codebase:

// Before
import DeviceInfo from 'react-native-device-info';

// After
import { DeviceInfoModule } from 'react-native-nitro-device-info';

#3. Update Module Name

Replace all DeviceInfo references with DeviceInfoModule:

// Before
const brand = DeviceInfo.getBrand();

// After
const brand = DeviceInfoModule.brand; // Also changed to property

#4. Convert Method Calls to Properties

Update method calls that are now properties:

// Before
const deviceId = DeviceInfo.getDeviceId();
const brand = DeviceInfo.getBrand();
const model = DeviceInfo.getModel();
const systemName = DeviceInfo.getSystemName();
const systemVersion = DeviceInfo.getSystemVersion();
const readableVersion = DeviceInfo.getReadableVersion();

// After
const deviceId = DeviceInfoModule.deviceId;
const brand = DeviceInfoModule.brand;
const model = DeviceInfoModule.model;
const systemName = DeviceInfoModule.systemName;
const systemVersion = DeviceInfoModule.systemVersion;
const readableVersion = DeviceInfoModule.readableVersion;

#5. Remove Unnecessary await Keywords

Remove await from methods that are now synchronous:

// Before
const uniqueId = await DeviceInfo.getUniqueId();
const totalMemory = await DeviceInfo.getTotalMemory();
const batteryLevel = await DeviceInfo.getBatteryLevel();

// After (no await needed, now sync properties/methods)
const uniqueId = DeviceInfoModule.uniqueId;
const totalMemory = DeviceInfoModule.totalMemory;
const batteryLevel = DeviceInfoModule.getBatteryLevel();

#6. Test Your Changes

Run your app and verify:

• All device info calls work correctly
• No runtime errors from async/sync changes
• TypeScript types are correct

#Complete Example

#Before (react-native-device-info)

import React, { useEffect, useState } from 'react';
import DeviceInfo from 'react-native-device-info';

function DeviceInfoScreen() {
  const [deviceId, setDeviceId] = useState('');
  const [brand, setBrand] = useState('');
  const [uniqueId, setUniqueId] = useState('');
  const [totalMemory, setTotalMemory] = useState(0);
  const [batteryLevel, setBatteryLevel] = useState(0);
  const [ipAddress, setIpAddress] = useState('');

  useEffect(() => {
    async function loadDeviceInfo() {
      // Everything was async or method-based
      const id = DeviceInfo.getDeviceId();
      const b = DeviceInfo.getBrand();
      const uid = await DeviceInfo.getUniqueId();
      const mem = await DeviceInfo.getTotalMemory();
      const bat = await DeviceInfo.getBatteryLevel();
      const ip = await DeviceInfo.getIpAddress();

      setDeviceId(id);
      setBrand(b);
      setUniqueId(uid);
      setTotalMemory(mem);
      setBatteryLevel(bat);
      setIpAddress(ip);
    }

    loadDeviceInfo();
  }, []);

  return (
    <View>
      <Text>Device: {brand} {deviceId}</Text>
      <Text>Unique ID: {uniqueId}</Text>
      <Text>Memory: {totalMemory}</Text>
      <Text>Battery: {(batteryLevel * 100).toFixed(0)}%</Text>
      <Text>IP: {ipAddress}</Text>
    </View>
  );
}

#After (react-native-nitro-device-info)

import React, { useEffect, useState } from 'react';
import { DeviceInfoModule } from 'react-native-nitro-device-info';

function DeviceInfoScreen() {
  const [ipAddress, setIpAddress] = useState('');

  // Sync properties/methods - instant access, no state needed
  const deviceId = DeviceInfoModule.deviceId;
  const brand = DeviceInfoModule.brand;
  const uniqueId = DeviceInfoModule.uniqueId;
  const totalMemory = DeviceInfoModule.totalMemory;
  const batteryLevel = DeviceInfoModule.getBatteryLevel();

  useEffect(() => {
    // Only async operations need useEffect
    DeviceInfoModule.getIpAddress().then(setIpAddress);
  }, []);

  return (
    <View>
      <Text>Device: {brand} {deviceId}</Text>
      <Text>Unique ID: {uniqueId}</Text>
      <Text>Memory: {totalMemory}</Text>
      <Text>Battery: {(batteryLevel * 100).toFixed(0)}%</Text>
      <Text>IP: {ipAddress}</Text>
    </View>
  );
}

#Benefits of Migration

#1. Performance Improvement

// Old: ~5-10ms per call (async + bridge serialization)
const brand = await DeviceInfo.getBrand();
const model = await DeviceInfo.getModel();
const memory = await DeviceInfo.getTotalMemory();

// New: <1ms total (synchronous properties + JSI)
const brand = DeviceInfoModule.brand;
const model = DeviceInfoModule.model;
const memory = DeviceInfoModule.totalMemory;

#2. Simpler Code

No need for async/await for simple getters:

// Old - required async function
async function getDeviceInfo() {
  const brand = await DeviceInfo.getBrand();
  const model = await DeviceInfo.getModel();
  return `${brand} ${model}`;
}

// New - direct access
function getDeviceInfo() {
  return `${DeviceInfoModule.brand} ${DeviceInfoModule.model}`;
}

#3. Better TypeScript Support

Full type definitions with excellent IntelliSense:

import type { PowerState, BatteryState } from 'react-native-nitro-device-info';

const powerState: PowerState = DeviceInfoModule.getPowerState();
// TypeScript knows: powerState.batteryLevel, powerState.batteryState, powerState.lowPowerMode

#4. Future-Proof Architecture

Built on React Native's New Architecture (Fabric + JSI) for long-term support.

#React Hooks Migration

Drop-in path: every RNDI hook is re-exported from the compat layer with RNDI's exact signature (including the { loading, result } shape for the async hooks). The codemod rewrites the import for you; usage is unchanged:

// Before
import { useBatteryLevel, useDeviceName } from 'react-native-device-info';

// After (rewritten to the compat subpath — usage identical)
import { useBatteryLevel, useDeviceName } from 'react-native-nitro-device-info/compat';

function BatteryWidget() {
  const batteryLevel = useBatteryLevel();        // number | null
  const { result: name } = useDeviceName();       // AsyncHookResult<string>
  return <Text>{name}: {batteryLevel}</Text>;
}

Native path: the package root exports 7 hooks directly, returning bare values (no AsyncHookResult wrapper). Use these if you migrate call sites to the native API.

RNDI's remaining hooks (useFirstInstallTime, useDeviceName, useHasSystemFeature, useIsEmulator, useManufacturer) are available on the compat path only, where they return RNDI's AsyncHookResult<T> shape.

See the React Hooks Guide for detailed hook documentation.

#Behavioral Changes (native path only)

These differences apply when you adopt the native API (DeviceInfoModule). The drop-in compat layer preserves the original RNDI behavior, so none of these affect you on the drop-in path.

1. Synchronous by default: Most methods no longer return Promises
2. Property accessors: Some getters are now properties
3. Module name: Uses DeviceInfoModule instead of DeviceInfo
4. Event listeners: Raw battery/network state listeners are not exposed; use the provided React hooks (e.g. useBatteryLevel, usePowerState) for reactive monitoring instead. The compat layer re-exposes RNDI's hooks unchanged.

#Troubleshooting

#TypeScript Errors After Migration

If you see type errors after migration:

# Clear TypeScript cache
rm -rf node_modules/.cache
yarn install

# Restart TypeScript server in your IDE

#Runtime Errors

If you get "Cannot read property" errors:

1. Ensure react-native-nitro-modules is installed as peer dependency
2. Run pod install on iOS
3. Clean build (yarn android / yarn ios with clean)

#Missing Methods

If a method is not available:

1. Check the API Reference for the correct method name
2. Some methods may have been renamed or consolidated
3. Open an issue on GitHub if you need a specific method

#Migrating from expo-device

If you're migrating from expo-device, many APIs have compatible alternatives in react-native-nitro-device-info.

#Key Differences

#API Migration Reference

#Migration Example

Before (expo-device):

import * as Device from 'expo-device';

async function getDeviceInfo() {
  const deviceType = await Device.getDeviceTypeAsync();
  const uptime = await Device.getUptimeAsync();
  const isRooted = await Device.isRootedExperimentalAsync();
  const canSideload = await Device.isSideLoadingEnabledAsync();

  return {
    brand: Device.brand,
    model: Device.modelName,
    yearClass: Device.deviceYearClass,
    totalMemory: Device.totalMemory,
    deviceType,
    uptime,
    isRooted,
    canSideload,
  };
}

After (react-native-nitro-device-info):

import { DeviceInfoModule } from 'react-native-nitro-device-info';

function getDeviceInfo() {
  // All synchronous - no async/await needed!
  return {
    brand: DeviceInfoModule.brand,
    model: DeviceInfoModule.model,
    yearClass: DeviceInfoModule.deviceYearClass,
    totalMemory: DeviceInfoModule.totalMemory,
    deviceType: DeviceInfoModule.deviceType,
    uptime: DeviceInfoModule.getUptime(),
    isRooted: DeviceInfoModule.isDeviceCompromised(),
    canSideload: DeviceInfoModule.isSideLoadingEnabled(),
  };
}

#APIs Not Available

These expo-device APIs do not have direct equivalents:

#Platform-Specific Considerations

#Uptime Behavior

• expo-device: Returns uptime in milliseconds (excludes deep sleep)
• react-native-nitro-device-info: Returns uptime in milliseconds (excludes deep sleep)
  • iOS: Uses systemUptime
  • Android: Uses uptimeMillis()
  • Both platforms return consistent "active time" matching expo-device behavior

#Device Year Class

Both libraries use the same Facebook algorithm for calculating device year class based on RAM and CPU specifications. The year class represents an estimated year that the device's hardware was considered high-end.

#Root/Jailbreak Detection

• expo-device: isRootedExperimentalAsync() - Experimental, basic checks
• react-native-nitro-device-info: isDeviceCompromised() - Comprehensive detection
  • Android: Checks su binaries, root apps, system properties, test-keys
  • iOS: Checks Cydia, jailbreak files, sandbox escape, suspicious paths

#Migrating from react-native-carrier-info

If you're using react-native-carrier-info for carrier information, you can consolidate into react-native-nitro-device-info.

#API Migration Reference

#Migration Example

Before (react-native-carrier-info):

import CarrierInfo from 'react-native-carrier-info';

async function getCarrierDetails() {
  const carrierName = await CarrierInfo.carrierName();
  const allowsVOIP = await CarrierInfo.allowsVOIP();
  const isoCountryCode = await CarrierInfo.isoCountryCode();
  const mcc = await CarrierInfo.mobileCountryCode();
  const mnc = await CarrierInfo.mobileNetworkCode();
  const operator = await CarrierInfo.mobileNetworkOperator();

  return { carrierName, allowsVOIP, isoCountryCode, mcc, mnc, operator };
}

After (react-native-nitro-device-info):

import { DeviceInfoModule } from 'react-native-nitro-device-info';

function getCarrierDetails() {
  // All synchronous - no async/await needed!
  return {
    carrierName: DeviceInfoModule.getCarrierSync(),
    allowsVOIP: DeviceInfoModule.carrierAllowsVOIP,
    isoCountryCode: DeviceInfoModule.carrierIsoCountryCode,
    mcc: DeviceInfoModule.mobileCountryCode,
    mnc: DeviceInfoModule.mobileNetworkCode,
    operator: DeviceInfoModule.mobileNetworkOperator,
  };
}

#Key Benefits

1. No async/await: All carrier properties are synchronous
2. Single dependency: No need to install separate carrier-info package
3. JSI performance: Zero-overhead native access via Nitro Modules
4. Unified API: Carrier info alongside 80+ other device properties

#Platform Notes

• iOS: Uses CTTelephonyNetworkInfo and CTCarrier APIs
• Android: Uses TelephonyManager APIs
• carrierAllowsVOIP: Returns actual value on iOS, always true on Android (no equivalent API)
• Empty strings: All properties return "" when no SIM card is present

#Need Help?

• Complete API Reference
• Type Definitions
• Examples
• GitHub Issues