1. react-native-qrcode-scanner

All modern and high quality mobile apps love the ability to scan qr codes, and you can easily use this feature in your React-Native. Use this package to add the ability to scan QR codes.

Github.com/moaazsidat/…

2. react-native-immediate-phone-call

This package is handy if you want to add a feature to your application that can initiate instant phone calls without any further steps.

Github.com/wumke/react…

3. react-native-colour-matrix-image-filters

You can use this package for basic image grayscale adjustments in your application. Each filter supports all view items, and if you need to combine several filters, it performs better than the corresponding stack of filter components.

Github.com/iyegoroff/r…

4. react-native-customized-image-picker

A good package to add a selector feature to your application includes a variety of different functions, such as cropping an image when selecting it. Supports camera, video compression and multiple images.

Github.com/shijingsh/r…

5. react-native-websocket

A WebSocket API is packaged as a React Native component. The component simply wraps the Native WebSocket API. If you use this package in production, you are advised to implement exponential fallback yourself.

www.npmjs.com/package/rea…

6. expo-document-picker

Provides access to the system UI for selecting documents from the available offerings on the user’s device.

Github.com/expo/expo/t…

7. react-native-fingerprint-scanner

There are a lot of challenges with cross-platform devices, and the right software package can help even more. It’s easy to add fingerprinting to your React-Native app, and it runs on Android and iOS.

Github.com/hieuvp/reac…

8. The other

If you want to learn How to React Native, you can learn how to React Native.