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Your mobile development company!

Would you like to build a modern and efficient mobile app? Compete with market leaders? Our team of mobile development experts will help your mobile app stand out in the industry. Choose the best mobile development partner to build a fast-performing and intuitive mobile app based on the latest technologies.

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Mobile development services

The right partner will help you save time and money while developing your product from scratch. Whatever you need, be it either a native mobile application or a cross-platform application, our experienced mobile development experts will help you achieve this goal. We offer expertise in creating applications that are error-free, scalable, and offer a flawless User Experience.

End-to-end mobile app development

As mobile developers, we’ll guide you through the entire process of mobile application development. Starting from Business Analysis, defining the project’s scope, UX design, UI design, mobile development, leading to testing, the product launch and maintenance. Basically, we use our knowledge to build quality mobile apps.

Mobile development experts

People create the software that makes today’s technology so impressive. Our mobile development experts are not only experienced programmers but also technology enthusiasts. Such an approach is the reason why they are always up to date with the latest solutions. Our culture of mutual learning and the constant desire for self-development makes our team only consist of top specialists in mobile development. You want to feel reassured, and feel like you can rely on the knowledge of the people who work on your mobile app. We will verify your assumptions, minimize risk, and complete the mobile app project on time.

The newest technologies

We change our approach depending on the project needs. We create native mobile applications using Swift for iOS development, Kotlin for Android development or cross-platform apps written in Flutter. All of these technologies have been in constant development for many years; consistently being changed and improved. There are technological giants behind them, such as Apple and Google. Moreover, the community that supports and develops mentioned technologies is vast, and only still increasing. Thanks to such great support, we can guarantee you that your mobile application will be modern, performant, and high-quality.

Transform your ideas into products

The very first step of mobile app development is an intensive product workshop session. Describe your business needs, and we’ll choose the best solution to meet them. Every project starts with technical consultation, business advisory, and product workshops. Not all the steps are always needed, but we as a team need to understand your concept, goals, and budget. Our programmers, testers, and project managers are striving only for your success throughout the entire mobile development lifecycle. After launching the product, we will take care of your mobile app’s support and further development.

Mobile development benefits

Choosing the right mobile development partner will give you many benefits. Find out about the most important advantages of working with CrustLab.

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The full-stack mobile development team

iOS Developers, Android Developers, Flutter Developers, Product Managers, Designers, and QA Testers.

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Solutions customized for business

You can rely on our know-how. Choose solutions that will help you increase profits and expand your business.

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MVP version in 1 month

Need to be on the market as soon as it’s possible? Choose the shortened delivery pipeline and gain the trust of investors.

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Top-class devs

Thanks to a challenging, multi-stage recruitment process, we accept only 4% of candidates of the CVs we receive. A team of experts is dedicated to your project.

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The newest technologies

To ensure security, scalability, and performance of native mobile applications or cross-platform apps.

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Full-stack UX/UI design process

Starting from business analysis, through collaborative UI/UX design, up to motion design. We build mobile apps designed for users’ needs.

iOS development

The market of iOS apps is expanding. There are already billions of mobile applications available, but even now, every day new apps are being developed and delivered. To make a difference, you have to plan ahead intensely and choose an appropriate partner. Our team of iOS development experts will lead you through every stage of the mobile app development process. We will help you define the project scope and choose the best mobile development strategies. Together we will create a flawless iOS app with high-quality source code, high performance, and an exceptional UX/UI design that supports your business goals.

What could you gain from an appropriate iOS development process and technologies?
Native app experience

Your mobile app will be designed to use all of the benefits of the iOS operating system.


You’ll be able to develop and extend the mobile application over the years.

SwiftUI components

We reuse ready-made SwiftUI User Interface components during the development and create entirely new components only if needed.

Quick implementation

The shortest possible time to market, thanks to many years of experience in working with the best iOS developers.

Community support

Support from a mature community of developers from all over the world, who are constantly helping each other.

We only use the best technologies
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SwiftUI is an open-source framework solely intended to create the best iOS mobile apps. Apple first developed the framework in 2014. As a replacement for Objective-C, Swift UI supports dynamic dispatch, late binding, extensible programming, and other core features of old technology. In addition, it’s designed to be compatible with Apple devices and operating systems. Equipped with tools to solve common programming problems, it has revolutionized how iOS mobile applications are developed. Programming with SwiftUI is rapid, not prone to errors, and ensures high mobile app performance.

Android development

Android is one of the oldest mobile operating systems, but it’s still changing significantly every year. To align with changes, trends, or guidelines, you need an experienced Android development team to create a native mobile application with a software craftsman mindset. Our team of Android development experts will lead you through every stage of the process. We will show you the best mobile development strategies and bring business ideas to life. Together we will create an excellent Android app with high performance, quality source code, and an attractive UX/UI design, which we know users will love.

What could you gain from an appropriate Android development process and technologies?
Native app experience

Your mobile app will be designed to use all of the benefits of the Android operating system.


You’ll be able to develop and extend the mobile application over the years.

High-quality source code

The Kotlin programming language guarantees excellent readability and a smaller code volume.

Quick implementation

The shortest possible time to market, thanks to many years of experience in working with the best Android developers.

Community support

Support from a mature community of developers from all over the world, who are constantly helping each other.

We only use the best technologies
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Kotlin is a cross-platform programming language preferred by Google. It’s designed to be compatible with many other programming languages, letting you extend any app with embedded Web or Unity components if needed. For a few years, it has been the preferred programming language for Android mobile application development, and we follow that recommendation. The introduction of Kotlin significantly increased the security of Android mobile apps and facilitated the writing of shorter, more readable source code. In addition, the extensive community of developers makes Kotlin the fourth most popular programming language according to GitHub.

Cross-platform app development

Flutter is an extensive cross-platform mobile app development framework. This technology is all we need to create a stable and functional mobile application. Our team of Flutter development experts have experience developing simple, and modern and extensive mobile applications using the Flutter framework, following our bespoke mobile app development process. We would love to show you our best practices in this area, and bring your cross-platform application to life. Together we will create an outstanding Flutter app – a single source code for both iOS and Android operating systems.

What could you gain from an appropriate Flutter development process and technologies?
Cross-platform mobile app

Building two applications based on a single source code will let you go to market quicker.


You’ll be able to develop and extend the mobile application over the years.

A native-like experience

Flutter guarantees a native-like experience for both iOS and Android mobile apps.

Quick implementation

The shortest possible time to market, thanks to many years of experience in working with the best Flutter developers.

Community support

Support from a mature community of developers from all over the world, who are constantly helping each other.

We only use the best technologies
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Flutter is a cross-platform Software Development Kit intended by Google in 2018. It’s designed to develop mobile applications running on Android and iOS, and web apps on Windows, macOS, and Linux. The most significant advantage of Flutter is that it uses a single code base to create applications for various platforms. Its other advantages are factors such as constant updates prepared by Google, and community developers. As a result, Flutter programming involves fewer heads and helps to minimize development costs.

The full-stack mobile development process

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Software development company case studies

Have a look at some of our mobile development case studies. Please note that due to confidentiality agreements, we cannot show all of the work we’ve been involved in.

Do you need a web app for a mobile project?

While thinking about a full-stack project, you need to consider parallel operation in other areas. For example, a custom web app application could be a great way to attract more customers and increase user engagement. If you want to hire web development experts, meet our developers.

Read more

Cooperation models

Depending on your needs, we offer different models of cooperation. If you do not have an in-house IT department, we can recommend you hire a Product Development team, which is a great way to save time and money and give you peace of mind resulting from the awareness that experts do your product development. For companies that have their own IT department, we recommend Staff Augmentation which fulfills a lack of knowledge of a specific technology, experience in a given industry or wanting to speed up development work and increase efficiency.

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Product development

An agile team covering all the skills is needed for valuable custom Digital Product development. Hire experienced team of Web & Mobile Developers, Project Managers, Designers, Testers, and DevOps who understand how to solve your business challenges.

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Staff augmentation

Strengthen your team with external software development experts. We offer a pool of talented programmers, designers, testers, managers, and others ready to join in and boost your software development!

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Trusted by leading brands

There is no better recommendation than the opinion of a satisfied customer. See what founders and managers say about their cooperation with CrustLab.

Contact us and get a free project estimation!

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Frequently Asked Questions

In this section, we have collected questions repeated during conversations with customers, and we have explained some key terms that may raise doubts. We hope you find the information below helpful. If you have any questions, please write to us!

  • What is a mobile development service?

    Mobile development is a service for creating mobile applications or software for use via a mobile phone. Mobile apps can be installed on the phone or run directly in the browser, but with the possibility of using all the features that a smartphone provides. Mobile development allows businesses to be even more accessible to customers from their favorite device, which they always have with them. This is how the engagement and frequency of visits in the mobile app grows.

  • What are the types of mobile development services?

    Due to the technology they are made of, we can distinguish two types of mobile applications:

    • native applications (iOS / Android / Windows development)
    • cross-platform applications (hybrid app development)

    When you decide to use a native mobile application, you need to write two separate source codes: one for the iOS mobile app and the other for the Android mobile app. It is a longer and more expensive process, but it achieves a much higher performance of the mobile app, offers better flexibility, and allows you to create a custom User Experience in a cheaper way. Cross-platform applications are cheaper to build because they operate on the basis of one source code regardless of the device and operating system. Hybrid applications are more complex, so it is more difficult to optimize them to achieve the highest performance.

  • What is a mobile application?

    A mobile application is a digital product that works with a mobile phone or tablet. Mobile applications use the capabilities of the device, so they are often based on such solutions as geolocation, sensors, or the use of a camera. They do not require a stable internet connection as things could be easily cached or stored in the device’s memory. Of course, it is possible to create an offline mobile application but that would depend on your business needs. You can benefit from mobile applications regardless of the industry.

  • What are the types of mobile applications?

    There are several types of mobile applications such as native applications – dedicated to a specific operating system iOS apps and Android apps, cross-platform applications – also known as hybrid applications, which work with any operating system or device. Mobile apps can be used in e-commerce, gaming, betting, fintech, travel, e-learning, sports, health care, transport, and many more.

  • I’m not sure if I need a mobile app. How to make this decision?

    If you have doubts about whether the mobile application can be useful to your business, ask about the experience of specialists in this field. Starting the project we consult your goals and challenges you are facing. Mobile apps are a solution that works well in most industries. If you are looking for new ways to reach your customers, this might be one of them.

  • My mobile application was created by a company with which I ended my cooperation. Am I able to develop this project or do I have to start a new one?

    Continuation of a project started by another company is not a problem for us if you have access to the source code of the app. In this situation, we start with an audit of the mobile app code to decide whether it is worth developing it or whether it is better to refactor the source code. Writing a mobile application that was created by another company can be difficult and time-consuming, but it is possible. Everything would depend on the quality of services offered by a company you cooperated with.

  • What type of mobile app should I choose?

    There are many factors you should consider when choosing the type of mobile app. Your business assumptions, industry in which you operate, budget, or marketing strategy will be as important as technical issues. It is important that you are determined before starting work on the mobile application. Changing your mind at a late stage will definitely be costly. Native mobile applications use the full capabilities of the device and work efficiently because they are optimized for a specific operating system. As a result, they only work on one platform, so the cost of creating native applications for other platforms increases. Hybrid applications are cheaper because they operate on the basis of one source code, but they require careful optimization to achieve high performance.

  • What type of mobile application is the most efficient one?

    It cannot be stated unequivocally, but in most cases, the most efficient mobile applications are native applications. This is because they are created exclusively for a given operating system, so they are easy to optimize to achieve high performance and ensure a good user experience. Another advantage is the wide range of APIs that developers can use to expand the functionality of the mobile app. In some cases, mobile applications created with Flutter technology could have very similar or even equal performance as the native applications. Everything depends on the features implemented in the app and its complexity. For simple applications with only a few screens and common UI/UX, the performance would be very same. In the case of complex applications, the difference could be visible.

  • When do I need a mobile app?

    Going mobile would definitely draw more customers and help grow your business. Some companies, depending on the industry in which they operate, treat mobile apps as a necessary element of their business strategy. This is because mobile applications increase customer engagement (through push notifications, gamification, or coupons), facilitate customer service, or simply increase conversions and revenues (e.g. in the e-commerce industry).

    However, these are not enough reasons to make you decide to create a mobile application. Before making that decision, answer the following questions:

    • What are your business assumptions and will the mobile application help to meet them?
    • Is there already such a mobile app on the market? If yes, how would you make a difference?
    • Would mobile applications bring new functionality to your business?
    • Would your target group like to use mobile applications?
    • Is your business ready to finance a mobile app and would it be profitable to create it?
  • What is Android development?

    Android development is the process of the creation of a mobile application that could be running on the Android Operating System. This is in fact the most popular mobile operating system in the world. Commercially sponsored by Google. Widely used in wearable devices (Wear OS), TV (Android TV), some IoT devices (RTV & AGD), car MMI systems. As for any kind of investment in mobile development, android development should be preceded by target market research.

  • What is iOS development?

    iOS development is the process of creation of a mobile application that could be running on the iOS operating system that is the OS of iPhone and iPad. It’s the second most popular mobile operating system in the world and the most popular mobile operating system in the US where iOS has over ~60% of the market share. As for any kind of investment in mobile development, iOS development should be preceded by target market research.

  • What is MVP development?

    Minimum Viable Product is the most basic version in which your product is capable of functioning. PWA has only substance looks, necessary to run the app and get to know the user’s feedback, and minimize the final cost of the project. Typically, the result of MVP development could be easily changed and extended with customs software development services, leading to a complete software product – mobile application, the web application of custom software service.

  • What is PWA development?

    Progressive Web App is a mobile version of a web page that behaves and looks like a native app. Users can choose a platform, operating system, or device to use it. Thanks to the PWA approach you can have a user-friendly, performant, and fast website as a mobile app which is not so expensive in comparison. PWA cannot use some of the mobile phone’s features but it is a perfect fit for example for e-commerce projects. PWA development is the process of creating a new or adjusting your existing web application so that the web application could be downloaded by mobile device users and used as a native mobile application.

  • What is Hybrid app development?

    A hybrid solution that mixes the features of web and native applications. Your app will run on different platforms without having to write separate source code for iOS and Android. This type of application is based on a single code regardless of the operating system, which makes it easier and faster to develop.

  • What is Native app development?

    Native apps unlike cross-platform solutions are designed for one particular operating system (iOS or Android). Focusing on only one platform allows more accurate optimization, maximization of performance, and meticulous design of the user interface of the app.

  • What technologies do you use for mobile development?

    When implementing the mobile development service, we use different programming languages, depending on whether the app operating system is: Android, iOS, or a cross-platform solution. In the first case, we focus mainly on: Kotlin, Java, RxJava. In the second case, we use technologies like Swift/SwiftUI. The third option arises using Flutter and React Native. There are also site libraries that could be used by us to support for example custom camera handling, sensors like Bluetooth, and others.

  • What skills should a mobile developer have?

    The skills most needed in the work of a mobile developer are primarily the knowledge of technologies such as Kotlin, Java, RxJava (Android development) and Swift, SwiftUI (iOS development), or Flutter and React Native (Cross-platform development). Depending on the business needs developers would have to know BlueTooth technology or libraries like Unity for a custom 3D game development. In addition, a mobile developer should be creative, communicate easily in English, know how to solve problems, and be able to analyze data. A good mobile developer knows the basics of designing User Interfaces for mobile devices and cares about cybersecurity issues.

  • What does the mobile development process look like?

    The mobile development process is nothing more than a description of the steps that take place in a certain order to complete the mobile development project. A typical mobile development process can be divided into the following stages:

    • Planning during which the entire product is defined, tools, technologies, a team as well as the division and sequence of tasks to be performed are selected.
    • Designing during which the visual layer of the product is created, initially in low-detailed mockups, up to the final version reflecting the appearance of the mobile app 1:1.
    • Development, i.e. the phase in which the assumptions planned and illustrated at the previous stages, thanks to the work of programmers, is rewritten in the form of source code and becomes a real product.
    • Launch, i.e. putting the mobile application into use

    The last, but very important part of the whole process is the Post-Launch phase, which consists mainly of collecting user feedback on the operation of the mobile application and introducing corrections.

  • How to use mobile development in business?

    If your business does not use a mobile app, you give up the possibility of reaching a large group of users who use mobile devices every day and have them in their pockets almost all day long. Thanks to push notifications and gamification, you will engage your audience. Geolocation will let you know when customers are nearby. And constant and direct contact with users will allow you to conduct an unlimited number of A/B tests. All this to increase sales and recognition of your products, as well as monetize traffic from the mobile app in a convenient and user-selected way.

  • Do you provide mobile app maintenance?

    Mobile app maintenance is one of our services. After completing the mobile development, we provide support in the maintenance and further development of the mobile application, review usage statistics, have a look at problems, and fix errors on an ongoing basis.

  • Do you provide mobile app quality assurance?

    Quality assurance is one of the most important parts of mobile development. Created software is continuously tested by a dedicated quality assurance team during the mobile development process. Before the official launch of an app, we perform tests on a wider group of potential customers of your product and make sure that we haven’t missed any problem. Once the app is published in-store, we review all the metrics, looking for potential bottlenecks and problems.