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Software house focused on your goals

We develop apps users want to have and your business wants to maintain

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Our projects

See our portfolio

forBET

Native app for one of the leading bookmakers in Poland. With forBET users can make bets anytime and anywhere. They also can stay up to date with current promotions and upcoming events.
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Answear

M-commerce app for online fashion retailer with more than 80 000 clothes, shoes and accessories from over 300 brands, including Adidas, Nike, Tommy Hilfiger, DNKY and Valentino.
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DLL Ebook

Educational app for Direct Language Lab – Polish publishing house that specializes in coursebooks for learning foreign languages based on direct method. Students in over 30 countries use DD Lab publications in language schools.
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Sprzedajemy.pl

Native Android and iOS apps for a free online marketplace where users sell and buy services and goods. Sprzedajemy.pl is dedicated mostly to individual sellers. It’s integrated with Facebook to let users verify each other’s credibility.
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TrackingDays

With TrackingDays users don’t need to worry if their stay in a foreign country lasts too long. The app keeps track of days spent abroad. It is now used in 60 countries, mostly by global expats and non-residents.
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trans.INFO

Native Android app for trans.INFO,
a popular website and forum about transport and logistics with over 40 000 articles. It’s visited by 1.5 mln readers every month. trans.INFO app provides its users with the latest news on logistics, delivery chain and transport.
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CoinDeal - Bitcoin Buy & Sell

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.
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forBET - iPhone app
Answear mobile app
DLL Ebook mobile app - Deutsch Buch
Sprzedajemy.pl app - main view
TrackingDays app - history and timeline
trans.Info app - main view
CoinDeal iOS app
Next project Answear
Previous project forBET

Services

We support our clients at every stage of the project. Our team will help you with ideation, design, prototyping and the entire app development process.

Cat and smartphones
Plant

Mobile apps development

We specialize in native apps development for iOS and Android. Swift and Kotlin are our preferred languages. We also create cross-platform apps with Flutter technology.

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Web apps development

We take care of both front-end and back-end, and make sure the interface is intuitive. Our solutions are always custom-made to meet users’ and business needs.

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Mobile apps connected
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PRODUCT DESIGN Workshops

During our workshops we plan a product development roadmap and choose suitable technologies. It’s the best way to find out what has to be done for your idea to see the light of day and bring measurable benefits.

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Technologies

We build our native iOS apps with Swift, while for Android we choose Kotlin. We also develop cross-platform apps with Flutter technology. And if you need a web app, our team will prepare it for you with PHP, Ruby on Rails, Node.js or React.js.

Kotlin logo
Swift logo
Flutter logo
Logo React
Logo Node.js
Logo Ruby
Logo PHP

Our clients

answear logo
Arkady Wrocławskie logo
Egmont logo
forBET logo
Galeria Dominikańska logo
Nordisk Film logo
Politechnika Warszawska logo
Rosa logo
Sky Tower logo
Trans.eu logo
Universal Music Group logo

Why choose us?

Logo Mobile Trends Awards

Mobile Trends Awards 2017

Nomination in
M-COMMERCE category

Logo Legalni bukmacherzy

Legal Bookmakers Award 2019

Best Mobile App

Mobile Trends Awards logo

Mobile Trends Awards 2020

Nomination in SPORT & RECREATION category

17

client reviews

Clutch logo

Testimonials

We need stable native applications to take part of mobile web users and reach out to new clients who are looking for a simple shopping app. (…) Holdapp’s efforts have increased orders. The project management is excellent. Their team was communicative and well-organized.

Paweł Salamucha Head of Web & Mobile Development, ANSWEAR

Build your app with us

Just answer a few questions, so we could estimate your project

1 What would you like to build?

2 What technologies do you want to use?

3 Do you want to build a new product from scratch or develop an existing one?

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You’re not ready for the estimation yet?
If you want us to help you choose the best technologies or features – let us know.
Send us a message to [email protected] or take part in our Product Design workshop.

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