Build an iOS App with React Native and Publish it to the App Store

Convert an Android React Native app to iOS and publish it in the Apple App Store.

Apple’s App Store is the holy grail for mobile developers. With React Native you can develop native apps for Android and iOS using a single code-base but getting things ready for publishing can be tricky, especially if you are starting with an originally Android-only application.

Here you’ll be starting with the code from a previous monster Okta blog post designing and publishing a calculator-like app on the Android Play store, which includes authentication via Okta.

For this post, you’ll first get the Android app to work well on iOS, as well as adding a splash screen and app icon. Then you’ll go through the signing process and publishing onto the App Store.

Start by cloning the repo and installing all the required libraries.

git clone
cd okta-react-native-prime-components-example
npm install

From here you should be able to say react-native run-android to deploy to an emulator or attached Android phone. Everything should work fine.

Configure Authentication for Your React Native iOS App

Right now when you click Login you will be taken to an Okta login page. This is connected to an Okta account I used for development. You need to create your own account and configure this app to use it.

First, sign up for a free Okta developer account, or log in if you already have one. Then navigate to Applications > Add Application. Select Native and click Next. Choose a name and click Done. Note your Login redirect URI and the Client ID since you have to add them to your app.

Now in your App.js find where the config variable is defined (near the top) and change the pertinent values to that of your Okta app:

const config = {
  issuer: 'https://{yourOktaDomain}/oauth2/default',
  clientId: '{clientId}',
  redirectUrl: '{redirectUrl}',
  additionalParameters: {},
  scopes: ['openid', 'profile', 'email', 'offline_access']

Running Your React Native App on iOS Simulator

Start by running react-native run-ios from a Mac computer. An iOS simulator should appear and in the console, your project will compile.

NOTE: If you get an error Print: Entry, ":CFBundleIdentifier", Does Not Exist there are several issues on Github tracking this with various suggestions on fixing it. The simplest might just to open up ios/prime_components.xcodeproj in Xcode and build the project from there.

You should see an error 'AppAuth/AppAuth.h' file not found. You need to link the AppAuth library to iOS. The easiest is with Cocoapods. Put the following into ios/Podfile:

platform :ios, '11.0'

target 'prime_components' do
  pod 'AppAuth', '>= 0.94'

After having installed Cocoapods change into ios/ and run pod install. This will take a while. Now close Xcode and open ios/prime_components.xcworkspace (note: the workspace, not the project!) in Xcode. The pods should appear as a separate project. Select a device and the project should build and run just fine (just click the play button). You may have to change the bundle identifier if the one used in this tutorial is already taken.

At this point, the factorization should work but if you click Login it will crash because your AppDelegate class needs to conform to RNAppAuthAuthorizationFlowManager. Open AppDelegate.h and change it to the following:

#import <UIKit/UIKit.h>
#import "RNAppAuthAuthorizationFlowManager.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate, RNAppAuthAuthorizationFlowManager>

@property (nonatomic, weak) id<RNAppAuthAuthorizationFlowManagerDelegate>authorizationFlowManagerDelegate;
@property (nonatomic, strong) UIWindow *window;


Now the login button should take you through the authorization process.

Adjust Styling in Your React Native iOS App

When I ran the app, the font was a bit large and the banner looked like it was showing the background behind the app. To fix these:

  • In components/Button.js change the font size to 25
  • In components/Header.js change the font size to 65
  • In components/Input.js change the flex to 1.5 and the font size to 60

The transparency issue in the header is from the iOS status bar showing. To hide this import StatusBar from react-native in App.js and add <StatusBar hidden /> at the top of the container:

return (
    <StatusBar hidden />

The app should look correct now.

Set the Icon and Display Name and Run on a Device

As in the previous post, you can use an app like Iconic to create an icon (though that one is for Android). Once you have an icon you can use an online service like MacAppIcon to get all the sizes you need. Then in Xcode open the prime_components project and click on Images.xcassets. You will see all the icons you need to fill it - simply drag them the correct sizes from Finder.

You will also want to change the display name of your project to fix the app name on your device. This is in the Identity section of the project settings.

Make sure you have set up the signing team and also that the Build Active Architectures Only is set to Yes for both debug and release, for both projects - This can fix a lot of integration problems with the AppAuth library.

Once done, you should be able to deploy to a device and see a proper icon and name for your app.

Create a Splash Screen for Your React Native iOS App

iOS apps have splash screens while they load. React Native creates a basic LaunchScreen.dib image which is just a white screen with the app’s name.

The easiest way to change this is by using the React Native Toolbox.

  • In components/Button.js change the font size to 25
  • In components/Header.js change the font size to 65
  • In components/Input.js change the flex to 1.5 and the font size to 60

For example:

A good image manipulation program to use is GIMP.

Next, install the toolbox as well as ImageMagick:

npm install -g yo@2.0.5 generator-rn-toolbox@3.8.0
brew install imagemagick

Now place your image inside of your project, close the workspace inside of XCode and run the following command:

yo rn-toolbox:assets --splash image.png --ios

Make sure to specify the correct project name! (In this case it is prime_components and not prime-components). The images should be generated and your project updated. Uninstall your app from the simulator/device and re-deploy from Xcode and you should see the new splash when loading the app.

Submit Your React Native App to the iOS Store

What follows are instructions on submitting your app to the App Store but since the Prime Components app already exists this is for those who have another app they’d like to submit. In that case, follow the instructions from the previous blog post (linked above) on how to design and build your own app before continuing here.

Review Guidelines

Before you begin it’s worth reading through Apple’s App Store Review Guidelines. In plain English, it explains what you need to make sure your app is ready (and why the app might be rejected during review). Things like safety and performance are covered, as well as business practices like advertising. A lot of it is very sensible.

App Store Connect

To get started login to App Store Connect and accept the terms and conditions. Then click on the My Apps icon.

Click on the plus sign and select New App. Fill in the required values. Here the Bundle ID is the bundle identifier you set in your project settings. It’s important this is a unique value - good practice is to start with a website you own like com.myblog.my_app. You can’t change this once you’ve submitted a build.

Once everything is filled in you will get to the app management page with three tabs for the App Store section: App Information, Pricing and Availability, and the iOS submission page.

Fill out everything as best you can. Any missing information will come out when you try to submit your app for review. Set the pricing to free, and the availability to all territories. Select two categories for your app in App Information. This is for people who are browsing for new apps.

Because you are not charging for your app and there is no advertising a lot of this process will go smoothly.

Build an Archive

iOS apps are distributed with archives. To build the archive, make sure the RnAppAuth is added to the target dependencies in the Build Phases of the prime_components project. Then go to Product and select Archive. This will rebuild and archive everything into one file.

Once done, the Organizer window should pop-up (which you can find in the Window menu):

From here you can validate your app. Click on Distribute to upload it to App Store Connect. Once that is done you should see the build in the submission page.


You need to add a few screenshots for your app. To do this simply go to the simulator menu - there is a screenshot option there. You might like to use a service like MockUPhone to give your screenshots a phone border.

Then you need to resize them in an app like Gimp. Your screenshots need to be the right size.

Once you’re finished, under the Prepare for Submission page select iPhone 5.5” Display (this is the only one you need to fill out), upload the screenshots you have.

Privacy Policy

Since October 2018 all apps in the App Store need a privacy policy, specified as a URL. Basically, you need to explain what data you collect and what you do with it. In this case, no data collected at all but you need to specify that and host a write-up for it on a website. There are several examples of what a privacy policy in this situation might look like such as this one.


Once all looks ready, click on the Submit for Review button in the preparation page. Here you will be asked to give your app a rating (you’ll be asked several questions about the app’s content). Make sure you’ve filled out the information of where reviewers will be able to contact you.

Once through, you should hear back within two days.

#mobile-apps #react-native #ios

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Build an iOS App with React Native and Publish it to the App Store
Autumn  Blick

Autumn Blick


How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

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Top 10 React Native App Development Companies in USA

React Native is the most popular dynamic framework that provides the opportunity for Android & iOS users to download and use your product. Finding a good React Native development company is incredibly challenging. Use our list as your go-to resource for React Native app development Companies in USA.

List of Top-Rated React Native Mobile App Development Companies in USA:

  1. AppClues Infotech
  2. WebClues Infotech
  3. AppClues Studio
  4. WebClues Global
  5. Data EximIT
  6. Apptunix
  7. BHW Group
  8. Willow Tree:
  9. MindGrub
  10. Prismetric

A Brief about the company details mentioned below:

1. AppClues Infotech
As a React Native Mobile App Development Company in USA, AppClues Infotech offers user-centered mobile app development for iOS & Android. Since their founding in 2014, their React Native developers create beautiful mobile apps.

They have a robust react native app development team that has high knowledge and excellent strength of developing any type of mobile app. They have successfully delivered 450+ mobile apps as per client requirements and functionalities.

2. WebClues Infotech
WebClues Infotech is the Top-Notch React Native mobile app development company in USA & offering exceptional service worldwide. Since their founding in 2014, they have completed 950+ web & mobile apps projects on time.

They have the best team of developers who has an excellent knowledge of developing the most secure, robust & Powerful React Native Mobile Apps. From start-ups to enterprise organizations, WebClues Infotech provides top-notch React Native App solutions that meet the needs of their clients.

3. AppClues Studio
AppClues Studio is one of the top React Native mobile app development company in USA and offers the best service worldwide at an affordable price. They have a robust & comprehensive team of React Native App developers who has high strength & extensive knowledge of developing any type of mobile apps.

4. WebClues Global
WebClues Global is one of the best React Native Mobile App Development Company in USA. They provide low-cost & fast React Native Development Services and their React Native App Developers have a high capability of serving projects on more than one platform.

Since their founding in 2014, they have successfully delivered 721+ mobile app projects accurately. They offer versatile React Native App development technology solutions to their clients at an affordable price.

5. Data EximIT
Hire expert React Native app developer from top React Native app development company in USA. Data EximIT is providing high-quality and innovative React Native application development services and support for your next projects. The company has been in the market for more than 8 years and has already gained the trust of 553+ clients and completed 1250+ projects around the globe.

They have a large pool of React Native App developers who can create scalable, full-fledged, and appealing mobile apps to meet the highest industry standards.

6. Apptunix
Apptunix is the best React Native App Development Company in the USA. It was established in 2013 and vast experience in developing React Native apps. After developing various successful React Native Mobile Apps, the company believes that this technology helps them incorporate advanced features in mobile apps without influencing the user experience.

7. BHW Group
BHW Group is a Top-Notch React Native Mobile App Development Company in the USA. The company has 13+ years of experience in providing qualitative app development services to clients worldwide. They have a compressive pool of React Native App developers who can create scalable, full-fledged, and creative mobile apps to meet the highest industry standards.

8. Willow Tree:
Willow Tree is the Top-Notch React Native Mobile App Development Company in the USA & offering exceptional React Native service. They have the best team of developers who has an excellent knowledge of developing the most secure, robust & Powerful React Native Mobile Apps. From start-ups to enterprise organizations, Willow Tree has top-notch React Native App solutions that meet the needs of their clients.

9. MindGrub
MindGrub is a leading React Native Mobile App Development Company in the USA. Along with React Native, the company also works on other emerging technologies like robotics, augmented & virtual reality. The Company has excellent strength and the best developers team for any type of React Native mobile apps. They offer versatile React Native App development technology solutions to their clients.

10. Prismetric
Prismetric is the premium React Native Mobile App Development Company in the USA. They provide fast React Native Development Services and their React Native App Developers have a high capability of serving projects on various platforms. They focus on developing customized solutions for specific business requirements. Being a popular name in the React Native development market, Prismetric has accumulated a specialty in offering these services.

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Hire Top-Notch React Native App Developers in USA

Do you want to hire talented & highly skilled React Native mobile app developers in USA? AppClues Infotech has the best team of dedicated React Native App designers & developers that provide the complete React Native solution & listed the top-notch USA-based companies list for your kind information.

For more info:
Call: +1-978-309-9910

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React Native Mobile App Development

React Native is a framework that allows you to build mobile applications for both Android and iOS platforms using a similar codebase. This can shorten the development time and reduce the overall cost of building mobile apps.

Looking to create Mobile Applications but low in the budget? Contact Skenix Infotech now to get the most effective React Native Mobile App Development Services.

#react native development #mobile app development #react native ios app #react native ui #react native mobile app #react native

Fredy  Larson

Fredy Larson


How long does it take to develop/build an app?

With more of us using smartphones, the popularity of mobile applications has exploded. In the digital era, the number of people looking for products and services online is growing rapidly. Smartphone owners look for mobile applications that give them quick access to companies’ products and services. As a result, mobile apps provide customers with a lot of benefits in just one device.

Likewise, companies use mobile apps to increase customer loyalty and improve their services. Mobile Developers are in high demand as companies use apps not only to create brand awareness but also to gather information. For that reason, mobile apps are used as tools to collect valuable data from customers to help companies improve their offer.

There are many types of mobile applications, each with its own advantages. For example, native apps perform better, while web apps don’t need to be customized for the platform or operating system (OS). Likewise, hybrid apps provide users with comfortable user experience. However, you may be wondering how long it takes to develop an app.

To give you an idea of how long the app development process takes, here’s a short guide.

App Idea & Research


_Average time spent: two to five weeks _

This is the initial stage and a crucial step in setting the project in the right direction. In this stage, you brainstorm ideas and select the best one. Apart from that, you’ll need to do some research to see if your idea is viable. Remember that coming up with an idea is easy; the hard part is to make it a reality.

All your ideas may seem viable, but you still have to run some tests to keep it as real as possible. For that reason, when Web Developers are building a web app, they analyze the available ideas to see which one is the best match for the targeted audience.

Targeting the right audience is crucial when you are developing an app. It saves time when shaping the app in the right direction as you have a clear set of objectives. Likewise, analyzing how the app affects the market is essential. During the research process, App Developers must gather information about potential competitors and threats. This helps the app owners develop strategies to tackle difficulties that come up after the launch.

The research process can take several weeks, but it determines how successful your app can be. For that reason, you must take your time to know all the weaknesses and strengths of the competitors, possible app strategies, and targeted audience.

The outcomes of this stage are app prototypes and the minimum feasible product.

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