Top 100 Cross Platform App Developers in the United Kingdom
The Best of December 2025Looking for a top cross platform mobile app development company in the United Kingdom?
Cross-platform mobile applications have benefits that outweigh those of native applications if your users interact with your business on both Android and Apple products. Cross platform app development entails building a mobile app that’s compatible with multiple operating systems. Cross-platform, or hybrid apps, use a single codebase, which means you don’t need separate apps with separate technologies to appeal to customers using Android or iOS. Because of this single codebase, cross platform apps are less costly to create and maintain.
Most hybrid apps will use either Ionic or React as a development framework. React is a JavaScript framework that allow apps to support Android and iOS natively, while Ionic uses JavaScript, HTML5, CSS, and Sass for hybrid apps, desktop apps, and progressive web apps. Choosing an app developer with the right skillset to fit the technology framework your app needs is a good place to start when interviewing app development companies.
To assist you in your search for a partner, we’ve compiled this list of the top cross platform app developers in United Kingdom. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best United Kingdom Cross Platform Mobile App Development Companies
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1$5,000+250 - 999 employeesLondon, EnglandLaunched in 2003, Konstant Infosolutions is an application development firm. The midsize Jaipur, India-based team offers Mobile App Development, Artificial Intelligence, UX/UI Design, and Web Development.Read More
Clients
United Nations Volkswagen Stanley Connect DelmonteIndustries
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2$25,000+50 - 249 employeesAmsterdam, NetherlandsSynergy Labs is an app development company. The midsize Hollywood, Florida-based agency was launched in 2020. Their services include Mobile App Development, Custom Software Development, Artificial Intelligence, Generative AI, and more.Read More
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3$10,000+250 - 999 employeesLondon, EnglandGeekyAnts is a Bengaluru, India-based custom software development firm. The midsize team provides Custom Software Development, Mobile App Development, Web Development, Artificial Intelligence, and more. The firm was launched in 2006.Read More
Clients
Siveco Romania Olive Garden Darden KhataBookIndustries
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4$10,000+250 - 999 employeesLondon, EnglandApplication development company Webskitters was established in 2010. Their midsize team is based in Kolkata, India; London, England; Miami, Florida and Claymont, Delaware. Their services include Mobile App Development, Web Development, E-Commerce Development, IoT development, and more.Read More
Clients
Mercedes-AMGIndustries
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5$50,000+250 - 999 employeesLondon, EnglandEmpat is an app development company established in 2013. They are in San Francisco, California; Kyiv, Ukraine; London, England and Miami, Florida and have a midsize team. Their services include Mobile App Development, Custom Software Development, and Web Development.Read More
Clients
Obimy — A mobile app connecting loved ones across distances with over 10 million downloads on iOS and Android. Enables seamless communication and emotional connection. Mobile app development and social networking focus. Bigsister — Custom AI software designed for sales performance tracking and analysis, providing clean, accurate data to optimize sales teams and improve efficiency with advanced analytics. Trigga — A fintech project featuring payment systems and a comprehensive analytical database to support secure transactions and financial insights for smarter decision-making. DentalCare — Healthcare ecosystem with mobile app, web development, and CRM tools for managing patient records, tracking appointments, and sending automated reminders to improve patient care.Industries
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6$50,000+1,000 - 9,999 employeesLondon, EnglandCustom software development firm Kellton is in Reston, Virginia; PERYDOT, Poland; Gurugram, India and Plano, Texas. The large agency was launched in 2009. Their services include Custom Software Development, Mobile App Development, Artificial Intelligence, BI & big data consulting & SI, and more.Read More
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7$25,000+10 - 49 employeesLondon, EnglandStakk is an app development firm based in London, England; Wilmington, Delaware; Amsterdam, Netherlands and Orlando, Florida. The small company was launched in 2016. Their services include Mobile App Development, Artificial Intelligence, and UX/UI Design.Read More
Industries
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8$50,000+1,000 - 9,999 employeesLondon, EnglandRead More
Andersen Inc. Is a software development company based in Warszawa, Poland; Kraków, Poland; Dallas, Texas and London, England. The large team provides Custom Software Development, IT managed services, Mobile App Development, IT strategy consulting, and more. The agency was established in 2007.
Clients
SamsungIndustries
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9$25,000+250 - 999 employeesMiddletown, DEFounded in 2013, Suffescom Solutions Inc is a mobile app development firm. The midsize team provides Mobile App Development, Blockchain, and Artificial Intelligence. The company is headquartered in New York, New York; Wilmington, Delaware; Sahibzada Ajit Singh Nagar, India and Singapore, Singapore.Read More
Clients
Morgan ElliottIndustries
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10$50,000+10 - 49 employeesYork, EnglandRead More
The Distance App Developers is an application development company established in 2009. The company offers Mobile App Development, Artificial Intelligence, and Product Design and has a small team. The company is based in London, England and York, England.
Clients
LeShuttle NHS Bentley Motors AstraZenecaIndustries
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11$1,000+1,000 - 9,999 employeesLondon, EnglandRead More
Dotsquares is an IT managed services company in London, England; Mount Waverley, Australia; Albourne, England and Jaipur, India. The firm specializes in IT managed services, Web Development, Custom Software Development, Mobile App Development, and more and has a large team.The firm was founded in 2002.
Clients
EricssonIndustries
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12$25,000+1,000 - 9,999 employeesWoodbridge Township, NJSoftware development company Vention is headquartered in New York, New York; Marietta, Georgia; Woodbridge Township, New Jersey and London, England. The large team provides Custom Software Development, IT staff augmentation, Web Development, Mobile App Development, and more. The firm was established in 2002.Read More
Clients
IBM PayPal pwc IC MarketsIndustries
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13$25,000+250 - 999 employeesChicago, ILTekRevol is a midsize application development company founded in 2018. Their team specializes in Mobile App Development, IT staff augmentation, Custom Software Development, Web Development, and more. The company is located in Houston, Texas; Red Deer, Canada; Newark, California and New York, New York.Read More
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14$10,000+250 - 999 employeesLondon, EnglandIn Sahibzada Ajit Singh Nagar, India; London, England and Great Neck, New York, SoftProdigy is a software development company. The midsize agency was launched in 2006. Their team offers Custom Software Development, Mobile App Development, Artificial Intelligence, cloud consulting & SI, and more.Read More
Clients
DeloitteIndustries
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15$10,000+50 - 249 employeesLondon, EnglandThoughtbot, a web development firm, is located in New York, New York and London, England. They focus on Web Development, Mobile App Development, UX/UI Design, cloud consulting & SI, and more and were launched in 2003.Read More
Clients
Health Match 360Industries
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16$10,000+10 - 49 employeesLondon, EnglandBased in London, England; Plymouth, England; Edinburgh, Scotland and Manchester, England, Coreblue is a custom software development firm. The small team offers Custom Software Development, Mobile App Development, IT strategy consulting, Low/No Code Development, and more. The agency was established in 2015.Read More
Clients
Bank of Kigali Executive Nexus ProConveyIndustries
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17$10,000+50 - 249 employeesPraha, Czech RepublicValor Software is a Lakewood, Colorado-based web design company. The midsize company was established in 2013. Their services include Web Design, UX/UI Design, IT strategy consulting, IT staff augmentation, and more.Read More
Clients
BreetheIndustries
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18$25,000+250 - 999 employeesLondon, EnglandRobosoft Technologies Inc. Is a San Francisco, California-based app development company. They offer Mobile App Development, UX/UI Design, Web Development, Custom Software Development, and more and were launched in 1996.Read More
Clients
Warner Bros. Discovery HSBC McDonalds Mercury FinanceIndustries
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19$5,000+50 - 249 employeesLondon, EnglandRead More
In Cluj-Napoca, Romania; London, England and New York, New York, Tapptitude is an app development company. The midsize team offers Mobile App Development, Web Development, UX/UI Design, Artificial Intelligence, and more. The agency was launched in 2013.
Clients
TenorIndustries
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20$50,000+50 - 249 employeesL'viv, UkraineRead More
Unicrew is a software development firm located in L'viv, Ukraine; Ormond Beach, Florida and London, England. The midsize company was founded in 2012. Their team focuses on Custom Software Development, Web Development, IT staff augmentation, and Mobile App Development.
Clients
Jack Cooper Transport Bigfood Group Booked It Open Room Inc.Industries
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21$10,000+50 - 249 employeesBarcelona, SpainHalo Lab is a midsize branding agency headquartered in Dubai, United Arab Emirates; New York, New York; 08, Andorra and Odesa, Ukraine. They offer Branding, Web Design, UX/UI Design, Graphic Design, and more and were established in 2013.Read More
Clients
Auth0Industries
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22$10,000+10 - 49 employeesLondon, EnglandRead More
COMPU-VISION S.A.R.L. Is a website development firm headquartered in Batroun, Lebanon; Miami Beach, Florida and London, England. The agency specializes in Web Development, Mobile App Development, and Custom Software Development and has a small team.The agency was launched in 2010.
Clients
Luxury Rentals Miami Beach Sleeping Plaza Masdar KSA Jetour QatarIndustries
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23$25,000+50 - 249 employeesAlexandria, VAPlavno, an app development firm, was established in 2007. The midsize team offers Mobile App Development, Artificial Intelligence, Custom Software Development, Web Development, and more. The company is headquartered in Alexandria, Virginia; Berlin, Germany; Calgary, Canada and London, England.Read More
Clients
Mercedes, Xerox, Kia, eBay, PayPal, Amazon , IBM, Bank, MediacubeIndustries
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24$10,000+50 - 249 employeesToronto, CanadaRead More
Launched in 2018, Rootquotient is a midsize software development company. Their team offers Custom Software Development, Artificial Intelligence, and Mobile App Development. The firm is based in Toronto, Canada; Chennai, India; Richmond, Canada and London, England.
Clients
Siemens GamesaIndustries
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25$10,000+250 - 999 employeesLondon, EnglandRead More
SENLA is a custom software development company. Their midsize team is based in Warszawa, Poland; London, England and Zagreb, Croatia. The company offers Custom Software Development, Web Development, Mobile App Development, Blockchain, and more. The company was founded in 2012.
Clients
Abbott BOSCH KPMG Western UnionIndustries
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26$10,000+50 - 249 employeesLondon, EnglandRead More
Old.St Labs is a London, England-based custom software development firm. Founded in 2020, the midsize team specializes in Custom Software Development, Web Development, Mobile App Development, and Artificial Intelligence.
Clients
Mariana UFP The Military App Allegr Pixel ArtworksIndustries
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27$25,000+2 - 9 employeesPlymouth, EnglandRead More
Elixel is an UX design company. Their small team is in Plymouth, United Kingdom. Their services include ux/ui design, mobile app development, web design, and web development. The company was established in 2012.
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28$100,000+50 - 249 employeesKraków, PolandN-iX Games is a mobile app development firm. They are located in L'viv, Ukraine; Kyiv, Ukraine; Malmö, Sweden and North Miami Beach, Florida and have a midsize team. Their services include Mobile App Development, AR/VR development, UX/UI Design, and Custom Software Development. The firm was launched in 2012.Read More
Clients
Paradox InteractiveIndustries
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29$50,000+250 - 999 employeesLjubljana, SloveniaInfinum, a custom software development company, was founded in 2005. The firm offers Custom Software Development, Mobile App Development, UX/UI Design, Web Development, and more and has a midsize team. The firm is in New York, New York; San Francisco, California; Zagreb, Croatia and Ljubljana, Slovenia.Read More
Clients
PhilipsIndustries
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30$10,000+250 - 999 employeesLondon, EnglandRead More
Launched in 2000, *instinctools is a software development company. The midsize team specializes in Custom Software Development, Web Development, IT strategy consulting, Mobile App Development, and more. The firm is in Stuttgart, Germany; Warszawa, Poland; Mississauga, Canada and Wilmington, Delaware.
Clients
Daimler Fujitsu Nostrum SpexAIIndustries
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