Over the short six years, the mobile application development industry has grown dramatically. In 2021, the revenue of mobile application development is expected to reach US$ 693 billion. In addition, mobility solutions are estimated to generate US$ 1.8 trillion by 2022.

Without a doubt, mobile application development is here to stay. While many businesses are looking for ways to benefit from this trend, many don’t know how to develop an app successfully.

Success in this lucrative landscape can become a reality for you – but only when you’ve understood how mobile application development works. Or should we say, how they are written?


There are over 700 languages ​​of programming, and each has its advantages and disadvantages. The best programming language depends quite a lot on the purposes as well as the operating system you are working with.

Here we will discuss the best programming languages for mobile application development. In this weekly column, you’ll understand four key points:

  • Explanation of the four best programming languages in 2021
  • Fool-proof guide to hiring mobile app developers more effectively
  • Where to hire a dedicated team of developers
  • The hourly rate of mobile app developers in 2021 across regions

Top Mobile Application Development Languages Explained

mobile-application-development-4-programming-languages With the changing demands of the industry, the demand for skilled professionals in these languages ​​is changing. Programming languages ​​are changing and evolving at the same time.

As we’ve mentioned earlier, there are over 700 programming languages in the world. You might wonder why are there so many languages just to code? Because people keep creating them!

Some languages suit better to carry out certain tasks than others. For example, if you want to develop games, it’s advisable to go for Python, DarkBASIC, etc. If you opt for business applications, C, C++, Java, etc. is your go-to.

That being said, here are the four best programming languages and frameworks for mobile application development.



Initial release: 2017


Currently, the most popular cross-platform alternative to React Native (jump down) is Flutter, a relatively new mobile application framework developed by Google. Developed based on the Dart programming language, Flutter takes a different approach to implement cross-platform features.

At InApps Technology, we strive to be at the forefront of emerging technologies, proudly to possess a sizable talented pool of Flutter engineers.

Due to being quite new, the Flutter community is rather smaller than React Native. However, developed to minimize previous setbacks, Flutter can provide fantastic performance and a native look to the apps developed with the support of the framework.

In other words, Flutter combines the ease of development with native performance while maintaining visual consistency across platforms.

Why Flutter for mobile application development?

  • Develop your application faster than the standard native application
  • App Maintenance Is Easy Thanks to Simultaneous Android and iOS Updates
  • Flutter’s “hot reload” makes it possible to make changes to the code and see the results immediately
  • Reduce Code Development Time
  • Increase Time-to-Market Speed
  • Suitable for any target platform
  • Minimize the risks and losses for your business

Hire a Flutter developer guide

Hard skills for a Flutter developer:

  • Understanding of Computer Science
  • Complete understanding of software development lifecycle
  • Knowledge of SQL
  • Experience with GoF patterns
  • Complete hold on Dart programming language
  • Good understanding of networking
  • Understanding of Flutter framework
  • Knowledge of programming languages for mobile application development (Swift or Kotlin)
  • Practical experience in iOS and Android development services

Soft skills for a Flutter developer:

  • Problem Solving
  • Teamwork
  • Communication Skills
  • Innovativeness

You may also like to read: Hidden Cost of Mobile Application Development

React Native (JavaScript)


Initial release: 2015


Unlike Swift (jump down) or Java (specialized for Android devices), React Native is a JavaScript framework that offers real, localized mobile applications both for iOS and Android.

Based on the response, Facebook’s JavaScript library, React Native makes the user border. Instead of aiming at the web browser, it targets the mobile platform. When it comes to mobile application development, React Native is considered to be the best framework for both iOS and Android.

To put it in a different saying, JavaScript language allows you to create one single app that can run on different platforms instead of creating separate apps for each system.

Thanks to this approach, companies can build faster and much cheaper applications for iOS and Android users.

Why React Native for mobile application development?

Our brilliant developers enjoy working with React Native for few reasons:

  • Speeds up the mobile application development process up to 30%
  • Can share the codebase for iOS, Android, and the Web (with ReactXP and React Native for Web)
  • Requires a smaller team
  • Lowers cost of mobile application development
  • Ensures stable growth of the app
  • Has a rich ecosystem: thanks to a wide range of libraries and tools that facilitate developers’ work and accelerate the software development process.
  • Can integrate with the native application

Hire a React Native developer guide

Hard skills for a React Native developer:

  • Excellent knowledge of JavaScript
  • Knowledge of basic React assumptions (concepts like Virtual DOM, JSX, component lifecycle, etc.)
  • Experience with Android and iOS development
  • Ability to write clear and readable codes
  • Nice to have: Familiarity with useful tech tools (Redux, Enzyme, Hockeyapp, etc.)

Soft skills for a React Native developer:

  • Good communication
  • Team players
  • Problem-solving
  • Nice to have: Ability to give constructive feedback, receive criticism, and generally be open-minded and curious folks.

You may also find this informative: Checklist for Hiring International Tech Talents




Initial release: 2014


Introduced in 2014, Swift is widely considered a game-changer in mobile application development. Swift is an open-source programming language specifically designed to work with Apple operating systems, that includes iOS, OS X, and tvOS platforms.

This language quickly became a household thanks to its flexibility, scalability, and easy adaptation to add modern features to any app.

Examples: Lyft, LinkedIn, Hipmunk are some outstanding examples of apps developed using Swift.

Why Swift for mobile application development?

  • Needs less maintenance, and avoids some of the bugs compared to Objective-C.
  • Projects are easier to scale up and expand
  • Intuitive, easy-to-learn yet powerful programming language
  • Has multiple features for seamless and safe design while producing lightning-fast software

Hire a Swift developer guide

Before hiring a Swift developer for any mobile application development project, you need to understand some basic skills and nice-to-have skills of every iOS developer.

Hard skills your future Swift developer should have:

  • Language proficiency Swift iOS
  • Standard knowledge of UI/UX
  • XCode IDE experience
  • An understanding of APIs and API integration experience
  • Knowledge of the Apple Human interface guidelines
  • Proficiency in Advanced code versioning instruments
  • Hands-on experience with Core Data or Realm
  • Nice to have: Knowledge of Metal and OpenGL

Soft skills your potential Swift candidate possess:

  • Approachable
  • Critical thinking
  • Sticking to deadlines
  • Ability to work as part of a team
  • Leadership
  • Self-presentation and negotiation skills
  • Diligence and persistence

Check this out: 5 Benefits of Choosing an ODC in 2021




Initial release: 2011


More and more developers are choosing Kotlin every day, GitHub reports.

Kotlin is an innovative programing language that is first developed for the Java virtual machine (JVM), Java libraries, and Android. In many ways, many people consider Kotlin a good substitute for Java.

However, Kotlin can also be used combined with Java to create higher performance and more efficient mobile apps.

Why Kotlin for mobile application development?

  • Saves time for developers as the less verbose language provides briefer and less redundant code
  • Can be compiled into JavaScript or an LLVM encoder
  • Has very clean syntax and easy code
  • Produces compact, cleaner, and more readable code than Java
  • Require less code for testing and maintenance

Hire a Kotlin developer guide

Below are some of the basic skills required for a Kotlin developer:

  • Procedural programming
  • Lambda functions
  • Null safety
  • Kotlin as a scripting language
  • Objects, classes, and abstract classes
  • Java Experience

Hard skills for a Kotlin developer:

  • Android app development
  • Website back-end scripting
  • Data storage on memory-limited devices
  • Object-oriented programming (OOP)
  • Functional programming
  • The unique features of the Java Virtual Machine (JVM)
  • Kotlin’s standard library and the Java Class Library
  • Testing and debugging Kotlin programs
  • Enterprise, commercial, and open-source projects

Soft skills for a Kotlin developer:

  • Problem-solving
  • Critical thinking
  • Sticking to deadlines
  • Team player
  • Self-presentation and negotiation skills
  • Diligence and persistence

You may also want to read this: 4 Questions to Understand When Setting Up a Succesful Offshore Team


Where to Hire a Mobile Application Development Team

Freelancers, remote employees, or IT outsourcing vendors? It’s a good question as it depends.

Firstly, we’ll explain more about each type of mobile application development team. Next, to get you started, we’ll put them in comparison to help you get a better look. Lastly, we’ll provide a list of different websites for you to consider.



If you have a relatively small project that doesn’t need a mobile application development team (from designers to testers), then a freelance developer can do just enough.

InTalents, Upwork or Freelancer are popular platforms for hiring mobile application developers. These platforms act as liaisons between employers and freelancers, processing payments and ensuring optimal protection for both parties in case of potential cyber fraud.

Pros of choosing freelancers:

  • Often the most cost-efficient way to gain access to a worldwide base of knowledge and skills.
  • Fewer responsibilities as an employer; once the project is delivered, the working relationship is either ended or paused until you collaborate on some project in the future.

Cons of choosing freelance developers:

  • The managerial overhead of keeping track of multiple tasks done by separate contractors.
  • Potential data security threats when allowing complete outsiders access to your confidential data.
  • They are less personally invested in the long-term success of your endeavor because of the temporary nature of their employment contract.

Remote employees


In case you have medium to long-term projects that need specific training, consider a remote employee for your mobile application development project.

A remote employee is somewhat more like an addition to your team, rather than an independent player like a freelancer. There are many places to find and hire a mobile app developer by yourself.

For example, LinkedIn is a good source. However, you’ll need to spend more time separating candidates who are not open to work or those looking for office-based positions.

As an alternative, you can opt for these options.

YouTeam connects individual developers from agencies and clients. All agencies and developers have to pass a thorough screening process. They will be banned if their skills differ from what they advertise. If you need a remote team of developers, YouTeam is a nice option.

Another example is, a popular platform searching for full-time and part-time remote contractors worldwide. Remote lets you either look for candidates manually or let the AI algorithm find the best talent based on the information you provide like project duration, skills, and the payment model.

Pros of remote teams:

  • You form productive and engaged teams ready for a long-term commitment.
  • Employees working remotely often cost less, as they don’t require office expenses and other benefits.

Cons of remote teams:

  • Hiring and forming teams from remote employees take significant time.
  • Corresponding parts of your project can be halted if they fall ill, go on vacation, or simply quit.
  • Correctly estimating their performance and productivity can be very challenging.

Outsourcing companies and agencies 


When you’re having a complex project or the need for future easy scale-up, a software outsourcing agency is your best choice. With this approach, you can hire top-notch mobile application developers having practical experience.

Added to that, it also ensures deadline commitment, quality may be exceeding your expectations, and management headaches won’t be yours to bother.

There are many firms offering this kind of service. While each has its own strengths, there is just a number that is suitable for you and your business goals.

Learn more: How to choose the right mobile app developer for your project?

For instance, companies like InApps Technology put great emphasis on being transparent and commitment to clients from all phases of the project. Working towards a long-term vision, the company strives to be a reliable companion rather than just an outsourcing vendor.

If you are worried about getting your money’s worth, InApps Technology offers pay-as-you-go. In other words, in case you don’t enjoy working with them in phase 1, you can easily move on to other more suitable vendors.

InApps Technology offers mobile app developers for hire, UI/UX designers, business analysts, project managers, QA experts, etc. Having provided 200+ effective solutions, we are proud to be listed as Top 1 software development company in Vietnam and Top 5 in Southeast Asia, according to Clutch and GoodFirms.

Read more: InApps listed in Top 100 Global in Software Development

Pros of outsourcing:

  • Access to ready teams having the needed expertise.
  • Innovative solutions to minimize time-to-value for your projects.
  • The technology vendor takes care of the team’s motivation, perks, benefits, and replacement if need be.
  • Data confidentiality thanks to best practices.
  • Time and resource

Cons of outsourcing:

  • You might experience few management complexities but controllable.
  • Cultural differences may initially be a challenge but can improve over time.

Process to hire Android, iOS, and Hybrid Mobile App Developers

At InApps Technology, we help firms augment their staff as well as carry out a mobile application development process from scratch.

Depending on the complexity, project progress, and your existing team, our dedicated team can work as a part of your team, or even solo, taking ownership of the final delivery. Generally speaking, this is how the whole process looks like:

Step 1: Requirements analysis

We gather and analyze your requirements (such as a precise description of your MVP, team size, expected workflow, etc.).

Even if you are a non-techie, we will thoroughly listen to your needs, translate them into specs for our brilliant developers, and support you set up the most efficient workflow.

Step 2: Hiring

Our HR team selects developers based on their experience, expertise, English fluency, and other aspects to fully meet your requirements. If we don’t have any talents at our disposal, it will generally take about a month to carry out additional hires.

However, in case there is an urgent need, we can tap into our trusted partners’ talent pool and find suitable resources to timely meet your needs.

Step 3. Integration

Having completed over 200 successful projects, we can integrate our talents into your in-house team with ease and set up the most appropriate workflow. If needed and when circumstances are favorable, you can meet our brilliant minds in person.

Step 4. The result

You can save up to 60% cost by hiring our dedicated team with high troubleshooting and communication skills. In other words, you can control your own dedicated team – just like your other employees.

The only difference is that we take care of all the crumble administrative tasks so you can focus on your core competencies, and more importantly, bring those brilliant ideas to reality!

You might also find this insightful: Hiring an Offshore Team: A Fool-proof Checklist

Hourly Rate of Mobile App Developers in 2021

When you’re hiring mobile application development engineers, keep in mind to consider all the additional costs. The data we compiled below are for reference purposes only, thus should not be viewed as the final rate. Our team collected data from Glassdoor, Codementor, Upwork, JayDevs, etc., so provide you a detailed hourly rate when hiring mobile app developers in 2021.

All the currencies shown below are in USD.

North America

Key countries in this region: the United States, Canada

Let’s see the average hourly rate for hiring a mobile app developer in North America.


Hourly Rate

Average Hourly Rate

United States

$37 to 77



$31 to 65


Western Europe

Key countries in this region: the United Kingdom, Ireland, Germany, France, the Netherlands, Switzerland

Let’s take a quick look at the average hourly rate for hiring a mobile app developer in Western Europe.


Hourly Rate

Average Hourly Rate

United Kingdom

$28 to 60



$30 to 60



$32 to 56



$26 to 60


The Netherlands

$26 to 60



$38 to 72


East Europe

Key countries in this region: Belarus, Ukraine, Russia

Check out the average hourly rate for hiring a mobile app developer in East Europe.


Hourly Rate

Average Hourly Rate


$20 to 48 



$19 to 50 



$22 to 55 


South Asia

Key countries in this region: India, Bangladesh

Let’s see the average hourly rate for hiring a mobile app developer in South Asia.


Hourly Rate

Average Hourly Rate


$10 to 45



$7 to 38


East Asia

Key countries in this region: China, Japan, South Korea.

Let’s dive into the average hourly rate for hiring a mobile app developer in East Asia.


Hourly Rate

Average Hourly Rate


$15 to 45 



$29 to 55


South Korea

$17 to 40 


Southeast Asia

Key countries in this region: The Philippines, Vietnam, Singapore

Let’s see the average hourly rate for hiring a mobile app developer in Southeast Asia – an emerging powerhouse in software development outsourcing services.


Hourly Rate

Average Hourly Rate

The Philippines 

$15 to 45



$10 to 40



$25 to 60


Go with InApps

Final Words

Thank you for reaching the end of this article. Feel free to reach out if you wish us to cover any topic you are interested.

At InApps Technology, we make efforts to listen to client’s needs thoroughly before starting any project. That’s why we keep on sharing these types of informative articles to help you gain more and more insights, and ultimately your firms’ needs and challenges and how to overcome them timely. 

Stay tuned for our next article: Web Backend Developer’s Choice: Best 6 Programming Languages.

You might also find these insightful:

How to get out of trouble with a bad offshore team? Read here

How to lead your offshore development team efficiently? Read here

Hiring an offshore team: A Checklist for Startups. Read here

Software Outsourcing Tips: How to save more costs? Read here

MVP App Development: A useful guide for new startups. Read here

Actions speak louder than words

Let’s hear from our clients


I’ve had great experiences with inapps in mobile app project. Recommend looking for a good outsource development firm for mobile game development or web development project to Inapps team.

Si Bui

Head of Business Development at Phunware

I have been really impressed with the team at Inapps. They are professional, work ahead of schedule and are technically strong across a range of fields.

David Liem


A great experience designing the front end of our website, responsive team and good end product. Great website/UX design capabilities.

Toby Scregg

CEO at Eve



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