Custom Application Development Company

Relevant is an international company that provides high-end custom app development services across a diverse number of industries. Discover how we can help your business to grow today with innovative software solutions today!

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Client testimonials

«We now have a core team of engineers at Relevant who work for us full-time and are supplemented by 4 or 5 engineers with different skillsets when and if required.»

Paul Carse
CTO and Co-founder of Life Moments

“Working with you guys has been fantastic. The level of expertise of your development team is as good as the people that we get in the UK. You’ve got a fantastic talent base of programmers. It’s more challenging to find people of that quality in the UK.”

Cassian Harrison
Co-founder of Splink Industries and My Theory Test App by James May
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Custom application development services we provide

Mobile App Development

Being a custom mobile application development company with years of experience on the market, our team features a comprehensive knowledge and skills in writing software for small, wireless computing devices, such as smartphones and other hand-held devices, which can be applicable for both B2B and B2C segments.

Database Development

Relevant experts have delivered dozens of projects related to designing and creating a database or data model, that allows efficient storage and retrieval of various data. The database solutions we deliver can fully correspond to all the needs and objectives of your business, regardless of their type and performance specifics.

SaaS Development

Our developers also have decent expertise in creating complete SaaS solutions using web-based technologies such as HTML, CSS, Javascript, PHP, Python, and Ruby, including relevant frameworks. Regardless of the client’s target industry, these cloud-based applications can be extremely cost-effective and functional in the long-term run.

Cloud Development

One of the most popular custom application services we deliver is cloud development, which enables quick and productive processing logic and data storage between two different types of environments: client-side and server-side. With this solution, clients can get a huge boost in business performance at lower costs.

Desktop Development

By leveraging advanced development technologies, we provide exceptional, standalone custom application service that helps automate and streamline business processes with scalable, user-friendly options for Windows, Mac OS, Linux, and Javascript-based desktop software to provide business-oriented solutions of different ranges.

API Development

Relevant’s professional API specialists have extensive experience in delivering API development and API integration services, using innovative and powerful solutions in today’s tech world, including .Net, Java, Angular, and others. By hiring our team, you can streamline API production with proficient technical service and regulatory support.

We also provide:
  • • Custom Software Development
  • • Product Development
  • • Dedicated Team
  • • DevSecOps
  • • Software Product Discovery
  • • DevOps Consulting
  • • Quality Assurance
  • • UI/UX Design
  • • Cybersecurity
  • • DevOps
  • • Machine Learning & AI

Why is Relevant a good choice for custom app development?


Agile Methodology

With the agile approach implemented to each of our projects, our custom app developers can deliver first-class value to Relevant’s customers, faster and with fewer headaches. Step-by-step deliverables help our clients effectively track the delivery progress and always keep on track of each process specifically.


Dedicated Project Manager

For each of our projects, we involve experienced developers with deep knowledge of the latest software development trends, the most effective tools, and a diverse range of languages, which directly impact the final outcome of your software product.


80% Employee Retention Rate

At Relevant, we care about both clients and our employees. That is why, we offer plenty of lucrative career opportunities and various motivations for our developers: financial or through upskill, internships, workshops, and more.


9/10 Client Satisfaction Score

For over a decade of successful performance on the market, we delivered nearly 200 projects from different industries, and over 90% of our clients are highly satisfied with the outcomes. Moreover, we have also multiple cases of repeated calls, which proves the quality of our custom application development services provided.


92% Of Senior and Middle Engineers

According to the most recent report from our HR department, 9 out of 10 employees of 150+ currently hired have middle to senior range in software development, which means you can stay sure to get the first-class custom app development service!


Risk Handling

As a reputable software development vendor, we know how important it is for our clients to keep everything on track. That is why each of the experts at Relevant takes full responsibility for delivering your projects at the highest quality and always on time.

Success cases

My Theory Test app by James May
Building #1 driving app in the UK
View case
Optimizing the service industry's tipping process
United States
View case
Reducing paperwork for construction companies
View case


What is software development?

Software development is the process of software creation, design, deployment, and support. Therefore, a software development expert is responsible for a variety of processes within the software project delivery, from initial planning to launching, maintenance, and improvement.

How to choose a custom software development company?

To pick up a reliable custom app development company, make sure it has deep expertise within your target industry, experienced developers, and a good reputation on the business review platforms. These are the basic aspects that can help you to define the most relevant software vendor in terms of price-quality ratio.

How long does it take to build custom software?

Building custom software usually depends on many different aspects, such as the project’s complexity, app functionality, industry, and delivery timeline. Typically, it requires 3 to 6 months to deliver an application, but if you need a more accurate estimation – it’s better to get an expert consultancy.

How much does custom application development cost?

Similarly to the development duration, the overall cost of a software development project will depend on the project individually. Usually, it covers the development time and complexity, the number of experts involved, and other criteria. To get more accurate costs on the development expenses, it’s better to contact your software vendor.

How could my business benefit from custom software?

Launching a custom software allows you to enhance the competitiveness of your enterprise, leaving many opportunities to grow and change along with the changing technology and business needs. Additionally, custom software features comparatively higher security levels and is more cost-efficient in the long run.

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Do you know that we helped 200+ companies build web/mobile apps and scale dev teams?

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