Mobile App Development


Mobile development is a challenging task at times, but when you clearly understand your idea and your developers understand the global mission of your app as well - this is when miracles happen.

Grossum offering

Grossum offers full-cycle mobile development - starting from interface prototypes and project's architecture to actual development, and subsequent QA, to make sure you have the best product in the end.

On our mobile development team, we have various specialists - from native iOS and Android developers to cross-platform developers to mobile quality assurance engineers and project managers.



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We use InVision and other tools to give the product owner a feel of what the app will look like, helping to identify the user path and streamline the experience.


Development begins before actual development. Architecture is an important step that helps to build the app based on industry and vendor specific standards and make sure the app works on all required platforms.


We have experience with developing native apps for iOS and Android as well as cross-platform mobile apps using Xamarin. Depending on the project requirements, we will discuss with you the best possible solution to make your project be ideal.


Making sure that your project works perfectly and does all that what was expected of it on all platforms you need, our QA engineers check and test the project. This isn't simply "finding errors" but making sure that your project meets the requirements.

Like what you see? Let's develop your project together!



payparking (Brazil)

Payparking is a web app and call-center solution focused on turning the parking experience into a modern and pleasant action.

Conarh ABRH 2015 Mobile App

CONARH 2015 (Brazil)

CONARH is the biggest congress in Latin America for Human Resources. Considering the number of people that visits this event, a need for a networking app arose.

Biudee Mobile App for Clear Skin

Biudee (Denmark)

An app created to make it easier to monitor and keep one's health and beauty under control.

Check out the projects



What are the things you should take into account when developing a mobile app / site or responsive website, besides the question about native or cross-platform? Read on!

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As the projects become more and more complex and more things should be tested, automated testing becomes your friend. In this article, we’ll take a look at the automating API tests using Python.

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Time & Material model of outsourcing is a contract based on the actual hours worked. This is a very flexible approach where you decide what is the most important for your Project and what should be implemented first. Perfect solution when you need to quickly adapt to the market demands.

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Presentation / GitHub