Custom mobile app development services aligned with your business goals

Our approach to mobile app development is not one-size-fits-all. We focus on understanding your business goals, target audience’s needs, technical requirements, and resource constraints to find the most suitable platform strategy.

Mobile responsive
web apps

Sometimes, optimising a web application for mobile devices is what your business needs. Our mobile responsive web development service ensures your app offers a consistent experience across various screens without the complexities and costs of full-scale app development.

  • HTML

  • CSS

  • JavaScript

  • TypeScript

Cross-platform app

When you need to deploy your app to both Android and iOS platforms but have a tight budget, our cross-platform mobile app development services are the solution. Our approach enables testing of your app concept across multiple mobile platforms, eliminating the need for immediate native development.

  • Flutter

  • Xamarin

  • React Native

Native app

Want to transform your mobile app with advanced functionalities? Our native Android and iOS app development services help you leverage the full capabilities of each platform, ensuring your app delivers a seamless and integrated user experience.

  • Kotlin

  • Java

  • Swift

  • Objective-C

Designed to impress users and deliver better business outcomes

By adhering to the best design practices, we craft exceptional UI/UX that enhances user interaction, boosts user satisfaction and drives engagement, directly contributing to improved business results.



We follow a user-centred design philosophy, resulting in an app that meets user expectations and achieves higher user satisfaction.

  • Mapping out target user needs & context

  • User journey mapping

  • Iterative design process

  • Early usability testing


Adherence to
platform guidelines

Our design processes adhere to industry standards such as Apple’s HIG and Google’s Material Design guidelines to ensure enhanced usability.

  • Intuitive navigation

  • Consistent design elements

  • Touch-friendly interactions

  • Optimised forms & inputs


Custom UI

For apps that require specialised functionalities, we design custom UI elements to deliver tailored interfaces according to your business requirements.

  • Branding consistency

  • Visual consistency across platforms

  • Adaptation to device features

  • Performance optimisation



Our mobile app design is inclusive, ensuring the navigation is accessible to users with disabilities, including those who use screen readers.

  • Adherence to iOS VoiceOver

  • Adherence to Android TalkBack

  • Screen reader compatibility

  • Dynamic text size support

Smooth performance on any platform or device

Our mobile app development company follows the best practices in terms of code quality, and quality assurance delivering solutions with optimal iOS & Android functionality. This way, we also strategically mitigate app store rejection risks, ensuring seamless releases.


Adherence to
platform-specific guidelines


iPad and Android
tablet-specific optimisation


Optimised graphics &
lightweight design elements




Extensive Android and
iOS devices coverage


Optimisation for the
latest OS versions


performance testing


feature updates


Framework & integration upgrades

A streamlined A-to-Z mobile app development process

Our mobile app development company follows the best practices in terms of code quality, and quality assurance delivering solutions with optimal iOS & Android functionality. This way, we also strategically mitigate app store rejection risks, ensuring seamless releases.



Strategy consulting

We work with you to understand your app goals and requirements, helping solidify the concept and advising on the most efficient mobile development strategy.

  • Requirements analysis

  • Existing solution and documentation audit

  • Platform selection consulting

  • Monetisation strategy consulting

  • Technology advisory


We then align your mobile app development goals with resource limitations, establishing delivery schedules and optimising resource allocation.

  • Feature scoping

  • Budgeting and resource planning

  • Risk analysis and risk management plan design

  • Strategic road mapping

Agile design

We sculpt your mobile app using rapid prototyping and early testing to align the application’s UX with user expectations, streamlining development.

  • Product wireframing and prototyping

  • UI/UX design

  • Solution architecture (front-end and back-end)

  • API design

  • Database design

Mobile app development

Working in two-week sprints, we implement your app’s functionality in small increments. Ongoing revisions ensure the app meets the defined requirements.

  • Front-end and back-end development

  • API integration

  • Infrastructure set-up

  • Automated code deployment

  • Unit testing

Testing and QA

Our testing team ensures your app meets app store guidelines and submission requirements, delivering a reliable experience across devices and scenarios.

  • Device compatibility testing

  • Usability and UI testing

  • Performance testing

  • Security testing

  • Regression testing

App release

The next step is to get the app store approval and get your mobile app published on major app stores without rejections or delays. Here's how we assist you:

  • Pre-submission review

  • Preparing product documentation

  • Communication with app store review teams

  • Resolving rejections

  • Knowledge transfer

Post release support

Once the app is released, we proactively monitor the app's performance and address any issues promptly. We help with the following:

  • Monitoring performance

  • Releasing new features

  • Providing bug fixes and security patches

Put together your mobile app development A-team

If you're looking for custom mobile application development services in London and beyond that deliver speed, cost-effectiveness, and a user-centric approach, share your mobile app development project details with us. Expect our game plan in return.

Value for money—client’s feedback about our application development services

I had this app idea in my head for years and GoodCore turned what was in my mind into what should be in my hands. They committed to a fixed-price project in a timeframe and delivered the product way beyond my expectations.

Zack Fortune

Zac Fortune, CEO,



Their project manager was very skilled and experienced. He ensured that the requirements for the mobile app were well understood and documented. Their lead developer was great at large-scale mobile app design and this was key to a successful delivery.

Mohamad Halizan

Mohamad Halizan Harith, CEO,

Nissen Technology 


I was looking for honesty, transparency, and great pricing in a partner, and I found that with GoodCore. The platform came out better than I had envisioned and works perfectly. The team has exceeded my expectations at every level and on every metric.

Scott Gardiner

Scott Gardiner, Founder & CEO,



My experience has been highly collaborative, and I think that a client couldn’t ask for anything better. Lots of developers can produce an app, but GoodCore is a dependable partner for any client whose business relies on complex software.


Tracey Walton, Managing Director,

Weight Loss Resources Ltd


Frequently asked questions

The cost of mobile app development services in the UK varies based on several factors including the app's complexity, design requirements, features and platform. A basic mobile application can start from £25,000, while apps with advanced features or extensive 3rd party integrations can cost significantly more. We offer a detailed consultation to understand your needs and provide a transparent quotation with no hidden costs.

Security is a critical aspect of our mobile app development process and our mobile app developers address it through a multi-layered approach:

  • Adherence to platform guidelines: We strictly adhere to the security guidelines and best practices of iOS and Android apps platforms.
  • Secure data storage: We implement robust encryption and secure data storage methods to safeguard sensitive information both in the app and during data transmission.
  • High code quality: Our mobile app developers follow secure coding practices to prevent vulnerabilities with regular code reviews and quality checks to maintain high standards.
  • Secure API communication: We ensure secure and encrypted communication between the app and any APIs or servers.
  • Vulnerability testing: We conduct comprehensive vulnerability assessments and penetration testing to proactively address security issues.

Our bespoke software development services so  include support for mobile app submission and release. We help with the following:

  • Creating a developer account: We set up and verify a developer account. If you already have an existing account on the Apple App Store or Google Play Store then we use that. 
  • Preparing store listings: We assist you in creating app descriptions, uploading graphic assets, and optimising with relevant keywords.
  • Addressing possible issues: If there are any issues or rejections, our mobile app developers quickly address and resolves them, making necessary modifications to comply with app store guidelines.

There are 3 options which you can choose from:

  • Fixed cost/fixed scope model, if you have well-defined requirements for your mobile application development project.
  • Dedicated team model, if your project requirements may change over time or you will need to hire mobile app developers for multiple projects over time.
  • Staff augmentation, if you want to bridge skill or capacity gaps in your existing in-house team without the need for expensive recruiting.

For a more detailed comparison of these models, you can visit our engagement options page.

Native mobile app development requires developing multiple versions of the app for different operating systems (like iOS and Android). Each version requires its own set of tools, languages, and expertise, which means essentially building and maintaining two separate iOS and Android apps. On the other hand, cross-platform development tools allow for a single codebase to be used across multiple operating systems, reducing development time and costs. However, cross-platform apps might come with some trade-offs in terms of leveraging mobile device’s hardware features.

We always strive to delve into our customers' specific business needs at the beginning of our collaboration to be able to suggest the best mobile app development platform based on their long and short-term goals and resource constraints.

The structure of our project teams depends on the complexity and specific requirements of your mobile application. Generally, a project team may include:

  • A project manager: Oversees the project, ensuring that your vision and goals are effectively met.
  • UI/UX designers: Designs the visual and interactive elements of the app.
  • Mobile app developers: The number varies depending on whether the project is for a single platform or cross-platform, and the complexity of the app features.
  • QA engineers: They ensure the app is thoroughly tested and free from bugs.
  • Backend developers: Included for apps requiring server-side functionality.

This team composition can be scaled up or down based on the size and complexity of your app project.

While our software development company does not directly provide App Store optimisation (ASO) services, we help you prepare essential documentation and media for your app. Our team ensures that all the materials align with the best practices for ASO, providing a solid foundation for you to collaborate with specialised ASO professionals to maximise your app's reach.

To get started, simply reach out to us by filling out the form below for an initial, no-obligation consultation. During this discussion, we'll understand your project vision and requirements. Following this, our team will analyse your needs and prepare a detailed proposal, including a timeline and quote. Once you're ready to proceed, we'll formalise our agreement and introduce you to the team that will build your mobile app.

Smoothly navigate mobile app development

Leverage our intelligent strategies, streamlined development processes, and robust quality assurance practices to secure the long-term success and durability of your mobile apps.

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