Cross-Platform App Development Services

As a cross-platform app development company, we help you save production costs, decrease time-to-market, and ensure a near-native user experience for iOS and Android.

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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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Cross platform mobile app development services we provide:

Cross-Platform Application Consultation and Architecture

Know the benefits of cross-platform app development for your business before hiring a team. Our cross-platform app development company will guide you through details to help you make an informed decision.

Cross-Platform Application Design

Our experts create a unique, user-friendly multi-platform design to present app’s functionality. We test it with real users to ensure your clients will have an uninterrupted performance on any device.

Cross-Platform Application Development

We use best development practices, modern technologies (BI, AR/VR, AI, etc.), and secure third-party tools to build a custom platform-agnostic application from scratch for any industry.

Cross-Platform Application Support, Maintenance and Optimization

Your clients deserve a friction-free, secure app performance 24/7 — our team delivers it. With Relevant, you get performance-friendly maintenance, quality tech support, and cost-saving optimization.

We also provide:
  • • Mobile web development
  • • Android mobile app development
  • • iOS mobile app development
  • • Mobile app penetration testing
  • • Mobile payment app development
  • • Swift development
  • • Kotlin development
  • • Java development
  • • UX/UI Design
  • • UX Research

Why is Relevant a good choice for cross-platform mobile app development services?


Agile methodology

Agile approach to cross-platform development ensures process flexibility and fast issue detection, and helps us keep the app up-to-date.


Dedicated project manager

A dedicated project manager gives you timely updates on design, development, and maintenance processes, as well as related expenses and future plans.


80% employee retention rate

Our teams work together for years, and this team spirit eliminates talent-related delays and improve workflow. We do everything to keep it this way.


9/10 client satisfaction score

If you search for an end-to-end service-oriented development company, look no further. Relevant has it in its DNA — and 90% of our clients prove it.


92% of senior and middle engineers

We hire variously-skilled developers to make sure your cross-platform app impresses your clients with innovation and impeccable performance.


Risk handling

We constantly review and improve the risk-handling practices and tools to mitigate the incident consequences faster with little impact on performance.

Success cases

Developing a SaaS platform that assists UK homebuyers
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Reducing paperwork for construction companies
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My Theory Test app by James May
Building #1 driving app in the UK
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Engagement models

Decide which model best suits your project


What businesses can order cross-platform app development services from you?

We work with all types of businesses as any company can benefit from cross-platform apps regardless of the size and industry. For example, the startups might want to save budget and make the app available to the public faster to better understand their target audience's needs and improve app’s functionality. Medium businesses can target various platform users and expand their market geography for less. Lange enterprises will find the cross-platform app easier to maintain.

Why should I opt for cross-platform development and not native?

While there’s nothing wrong with choosing native development, there are a few solid reasons to consider services from the cross-platform mobile development company. First, cross-platform development is cheaper than native development for each platform separately. Second, it allows targeting various platform users while offering them equal near-native performance. Third, the cross-platform apps are easy to upgrade, maintain, and integrate with various tools.

Who becomes the owner of the code after project completion?

Complete code authority goes to the business entity/owner who requested the development services from our company. We will state it in our contracts for you to be sure that we won’t claim any rights after we develop the app for you.

What do you do to keep my business data secure? Do we sign an NDA for my project?

We sign an NDA before each project initiation to keep your business information and trade secrets confidential. In this agreement, we write out what measures we undertake to ensure data security, what information we may operate with for the project purposes, and who is authorized to use the data.

How much would your cross-platform app development services cost?

The development cost varies from solution to solution. Usually, the price depends on the project’s complexity, features, technology integration, platform coverage, etc. At Relevant, we use the same pricing model based on the time and resources used. You will receive invoices once in two weeks with a detailed description of work done.

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

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