CrustLab your mobile development service provider!

We provide a full mobile app development lifecycle, including UX/UI for native and cross-platform apps. Contact us and let's talk about the development possibilities of your mobile apps.
mobile development services


projects in betting industry


of senior developers


employees onboard


active users of our apps


Development languages


Clutch rating

Mobile app development

Mobile app development

With Kotlin for Android or Swift for iOS platform as native solutions you would get access to the full potential and capabilities of mobile devices.

Flutter makes it possible to create native mobile applications with Google's UI toolkit. Thanks to Dart technology we can create natively compiled mobile apps for Android and iOS from a single codebase, reducing the cost of app development.

Having a broad experience in a variety of mobile technologies - from native to cross-platform apps, our mobile development team will suggest the best solution for your project and create modern mobile applications.

We take care of the entire mobile development process, from consulting your app idea, through UX/UI design, to development, testing and maintenance. If you want to verify our skills and style of work you can ask for free project estimation and a two-week test period. After development phase you gain full ownership of the product.

Full stack mobile development process

Ideation - CrustLab

The cognitive process, thanks to which we verify your product idea and advise on the best solutions.

Design - CrustLab

Our designers create low fidelity mockups and after your approval - final vision of your product.

Production - CrustLab

Source code of your product is created based on previously designed mockups.

Improvements - CrustLab

Even finished product needs improvements based on user behaviour and opinions.

Mobile development case studies - read more about our mobile apps

Sportech online betting platform

Next generation of multi-tenant Horse Racing betting system hosted by one of the biggest players in the betting industry.

Read more


on production during the Triple Crown

16 → 24


Mean session time


as of 31/01/2020

241% increase in number weekly sessions per user

ICEO - Android widget application

Development of Android widget application which allows the user to follow the cryptocurrencies rates in realtime.

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of required network resources

85% → 99%

stable sessions




of widget optimization

Pretta - project management
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Project management

Cost estimation

Pretta - project management iOS application

Readable and easy to use even for lay people iOS application designed to optimize project management processes.

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time needed to create the estimation



of estimation

Mobile development

Mobile development
iOS development

iOS development

Mobile operating system created by Apple. It’s the second most popular mobile operating system. iPhone devices are especially popular in the US market.

Android development

Android development

The most popular mobile operating system. Commercially sponsored by Google. Widely used in wearable devices (Wear OS) and TV (Android TV).

MVP development

MVP development

Minimum Viable Product is a beforehand version of the application, which has only substance looks, necessary to run the app and get to know the opinions and needs of users, and minimize the final cost of project.

PWA development

PWA development

Progressive Web App is a mobile version of regular website that looks and works like mobile app. Users choose platform to use it. By using PWA approach you can have website as performant, fast and user-friendly as native mobile application with relatively small costs.

Hybrid app development

Hybrid app development

A hybrid solution that combines the features of web and native applications. Thanks to that approach your app will support multiple platforms. This type of application base on single code regardless of operating system, which makes it easier and faster to develop.

Native app development

Native app development

Native apps are designed for one, particular operating system. Focusing on only one platform allows more accurate optimization, maximization of performance and meticulous design of the user interface of the app.

Mobile development cooperation model

You choose the cooperation model yourself

Dedicated team - CrustLab

We can provide you with a dedicated team

Extension of your IT

Extension of your internal IT department

Custom mobile app development

Custom mobile app development

Everything you can expect from a custom mobile app can be created from scratch with our custom mobile development service. Tell us about your needs and the difficulties you face. We will advise you on the best mobile development solutions and implement them to your custom mobile app. We have created custom mobile products for fintech and betting industries using latest trends in iOS and Android apps development. If you are looking for a company that create a high performance app which work in real-time fill in the contact form and let’s talk.

Mobile development for business

Mobile development for business

We are experienced and familiar with work on mobile development solutions for enterprise business that could improve the overall efficiency, bring down costs, and boost business growth. We are at your disposal regardless of whether you need a dedicated solution created from scratch or you want to improve the performance of your current digital products - fill in the contact form and let’s talk.

How much mobile development cost?

How much mobile development cost?

Are you wondering how much your mobile development will cost? Fill in the contact form and receive a free estimate. We value each project individually and the valuation process itself is easy and transparent: - first, we discover your needs and requirements - then we convert the list of requirements into user stories - after that, we estimate time required to finish stories - based on time and required resources we are ready to send you our offer

Technologies we use in mobile development

Mobile development technology Swift

Multi-paradigm compiled programming language developed by Apple.

Mobile development technology Kotlin

A great choice for building Android apps.

Mobile development technology Flutter

Cross-platform solution for building Android/iOS applications.

Adam Gontarz - CEO of CrustLab

Hi, I'm Adam - CEO of CrustLab

I would love to share my experience and talk about challenges you are facing! Feel free to reach out to me to discuss your ideas and needs for any project.

Why do you need to hire CrustLab as a mobile development service provider?

Mobile development partner

Our company has three founders and one of them is always involved in your project,

because every mobile application is just as important to us.

We are flexible when it comes to team composition or cooperation model -

first of all we can help you to develop mobile app requirements and specification, you can have a dedicated mobile development team or app development team with product owner. We can also support your internal IT team - whatever you need to build and maintain your mobile application.

+10 projects implemented in the betting industry -

focus on horseracing, sports betting, online casinos and retail. We’ve created software for self service terminals, web and mobile apps. We have a lot of experience in this area but the scope of our portfolio is wider - we love working on the: e-commerce, trading platforms, investment software, medtech (healthcare), blockchain or custom CRM/CMS.

We will serve your project comprehensively -

starting from strategic and product workshops, through design, frontend and backend development to maintenance or even marketing activities.

What additional values do you gain through having CrustLab as a mobile development partner?

Free project estimate and deep understanding of your needs before the mobile app project starts -

this is your first saving you get thanks to cooperation with CrustLab.

Transparency and ease of communication

(100% office-based team) - when we work on your mobile application you have access to Issue Tracking Tool - JIRA, project documentation on Confluence, Slack channel dedicated to your project (but all binding provisions we determine by email). You can also contact directly with every member of the team, not only the Project Manager.

Proactive approach and project workshops -

we are not waiting for a ready-made action plan, we are here to help you in creation of product strategy and making the key decisions.

Excellent technical skills and work done on time -

are something that our clients always emphasize in the testimonials.


sensitive information and shared data regarding the project or your company are secure and protected by the law.

We follow the main principles of Agile and Lean Management -

we strive to ensure that the methodology of work allows us to achieve satisfying results.

Mobile development partner 2
bubbleQuotiation symbol

Trusted by leading brands

Sportech logo

CrustLab consistently adds value to our organization in many ways. We've received very positive feedback on the system CrustLab has delivered. Our customers regard it as an excellent product. Our experience working with them has far exceeded those of other vendors.

Scott Watterson

Director of Digital Development

Clutch logo
Nowe Motywacje logo

We take advantage of CrustLab's experience in the field of payments, new functionalities and user-friendly design. The development process itself ran smoothly and according to plan. It was important for us to complete the project on time, so I cannot imagine a better partner for this project.

Agata Kołodyńska

Director of Operations in Nowe Motywacje

Start working on your mobile development right away!


Contact us

Contact us

Fill out the contact form, briefly describe your project or ask us a question.


Discovery call

Discovery call

Adam - our CEO will arrange a video meeting with you in order to clarify the project assumptions.


Project estimation

Project estimation

On the basis of the collected information, we will prepare an estimate of the costs and duration of the project.

Frequently Asked Questions

In this section, we have collected questions that are 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 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 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 is 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 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 a process of 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 a target market research.

What is iOS development?

iOS development is a 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 a 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 users 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 a 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 single code regardless of 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, are rewritten in the form of source code and become 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.

ul. Nadwiślańska 1/10

30-527 Kraków, Poland

[email protected]

+48 795-856-491

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