Mobile App Development Services

Build your iOS and Android apps with us and discover new possibilities mobile technologies can offer.



Comprehensive approach to mobile app development


Android app development

Apple iOS

iOS app development


Cross-platform app development

Icon: smartphone

UX/UI Design

Icon: report

QA tests

Icon: Selection

Project management

Our mobile app development services

Native iOS and Android apps

Designing UI in native apps

Find out when it's best to choose a native app.

We offer mobile app development services with a special focus on native iOS and Android software. To achieve desirable results, we use Swift and Kotlin. Our native mobile apps guarantee smooth performance even when they offer multiple features based on system components. We customize gestures and navigation elements, so they are adjusted to either iOS or Android standards.

Designing UI in native apps

Find out when it's best to choose a native app.

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Cross-platform apps

UI building in cross-platform apps

Get to know the benefits of cross-platform app development.

If you want to reach users of Android and iOS devices with one application – choose a cross-platform technology. It’s recommended especially when you want to shorten time to market. At Holdapp, we develop cross-platform apps with Flutter technology.

UI building in cross-platform apps

Get to know the benefits of cross-platform app development.

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Native or cross-platform technology:
which is best for mobile app development?

Sometimes, it’s hard to decide what kind of mobile app would be the right choice for your project. This is when the Product Design workshop comes to the rescue. Take part in a session and find out what solutions are recommended in your case.

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Mobile app development process

Every mobile app is unique and has to be treated individually. But at the core of each project there’s an optimized development process that allows us to work efficiently and create products that bring real profit to your business. Sometimes, before the app development process begins for good, we recommend conducting Product Discovery workshop to analyze the product vision and improve it.


Kick-off & preparations

Before we write the first line of code, we take care of organizational issues. During the kickoff, our team meets the client’s team. We all introduce ourselves and tell others about our roles in the project. Then, we talk about the goals, tasks, and methods that enable us to build the MVP. Among the topics we discuss is also the billing model and the communication between the team members. After this meeting, our app developers analyze the project scope and identify the risks. Then, they choose the right tools. At the end, the team prepares the initial version of the backlog.



It’s an optional stage in a product development process when we prepare a UI/UX design. We conceive the projects based on wireframes, personas, or other tools that help us create both functional and aesthetically pleasing designs.


Development & testing

We work in iterations, according to agile development guidelines. Over the course of one iteration, the team meets every day and exchanges the info about the current status of progress. When the iteration is finished, a quality assurance specialist tests the product. We also conduct retrospective meetings to discuss what worked well and what needs to be improved. With us, you’re always kept in the loop. We regularly show you what we’ve developed, so you can see if the project moves in the right direction.


Product release

We take care of the entire distribution process, so you don’t need to do it all by yourself. It’s on us to make sure your mobile applications meet all the requirements Google Play and Apple App Store have. We’ll let you know what legal and marketing materials you should prepare. We can also advise you on ASO-related issues.



Think of this stage as a second part of the development & testing phase. This is when our mobile app developers improve the product, make sure it’s stable, and add new features. When the new version of the application is tested and ready to go, we get back to the Product Release stage and begin the distribution process on Google Play, Apple App Store or Huawei AppGallery platforms.

Languages & technologies

Native apps

Cross-platform apps


answear logo
forBET logo
Homla logo
Egmont logo

Build your mobile application with us


Our mobile app development team



CTO & iOS Developer



iOS Developer

karolina ios developer


iOS Developer



iOS Developer

team member


iOS Developer

Android developer Grzesiek


Android Developer

Android Developer Dominika


Android Developer



Android Developer

Android developer Igor


Android Developer

Rafał - Android developer's portrait


Android Developer

team member


Android Developer


Flutter Developer

About our mobile app development services

Why choose our software development company?

Our team has been creating mobile apps since 2012. We have only accomplished developers on board, with at least 4 years of experience in software development. So, if you decide on creating your app with us, you can rest assured that the project is in good hands.

We’re the app development company that likes challenges and out-of-ordinary projects. This approach allows us to make software that gets recognized not only by our clients or users. Our apps have been nominated for the Mobile Trends AwardsAnswear in 2017 and DaNoize in 2020. We’ve also developed the award-winning mobile app for a sports betting company forBET.

What do we offer as a part of mobile app development services?

We do our best to answer clients’ needs, so we offer a comprehensive approach to mobile app development. If you want to polish your idea for an application, we can run a Product Design workshop for you and your team. Additionally, our specialist can also prepare UI/UX designs.

Our main field of expertise is mobile app development – we specialize in building native iOS and Android apps. We also develop applications for two platforms with Flutter.

As a mobile app development company that considers quality a priority, we offer QA services. Our testers carefully check all our products before they get published on the app stores.

Project management is another service we offer that helps us work efficiently. If you decide to develop a mobile app with us, we can either assign you a dedicated project manager or our software developer can become a technical coordinator, instead.

Pricing models for mobile app development

We often cooperate with clients based on a time and materials model but sometimes, we also sign a fixed price contract. The latter is usually recommended when you want to develop an MVP or your budget is limited.

Times and material is a more flexible model that increases the chances to build a top-tier, marketable product but it’s less predictable when it comes to budget and deadlines.

Here you can find more info about these two billing models that can help you choose the best one for your project.

Efficient cooperation even in different time zones

We’re a software development company based in Europe. We have our office in Poland but we cooperate with clients from all around the world. Even if team members live in different time zones, we can adjust our meetings accordingly, so everyone could be actively involved in a mobile app development process.

Our projects

Forbet app for Apple watch
forBET - iPhone app

Legal Bookmakers Award 2019:
1st prize in Best Mobile App category

ios / android


Native app for one of the leading bookmakers in Poland. With forBET users can make sports bets anytime and anywhere. They also can stay up to date with current promotions and upcoming events.
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Mobile Trends Awards 2023: Winner in M-COMMERCE DEVELOPMENT category

ios / android


M-commerce app for online fashion retailer with clothes, shoes, and accessories from over 400 brands.
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DaNoize iOS app
DaNoize app

Mobile Trends Awards 2020: nomination in Sport & recreation category

ios / android


Native iOS and Android apps for sports fan who can use it to support their teams with cheering even if they cannot watch the game from the stands.
Find out more
CoinDeal iOS app
CoinDeal mobile app - wallets

ios / android


Native Android & iOS apps for one of the safest cryptocurrency exchange platforms in the world. CoinDeal lets users buy and sell cryptocurrencies by choosing from over 50 currency pairs.
Find out more

Learn more about mobile app development

Check our other services


Web app development

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Product design workshops

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