Top 100 Cross Platform App Developers in the United Kingdom

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Top 100 Cross Platform App Developers in the United Kingdom

The Best of June 2025

Looking 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. 

Jump to Most Reviewed Companies

List of the Best United Kingdom Cross Platform Mobile App Development Companies

  • 1
    (43 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $25,000+
    50 - 249 employees
    London, England
    Synergy Labs is a midsize application development firm. They offer Mobile App Development, Custom Software Development, Artificial Intelligence, Generative AI, and more and were established in 2020. The company is headquartered in Hollywood, Florida; Miami, Florida; New York, New York and Dubai, United Arab Emirates.
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    Industries

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  • 2
    (164 Reviews) 4.8

    Timeliness

    4.7

    Service Excellence

    4.7

    Value

    4.7

    Would Recommend

    4.8
    $5,000+
    250 - 999 employees
    London, England
    Based in Jaipur, India; New York, New York; London, England and Dubai, United Arab Emirates, Konstant Infosolutions is an app development firm. The midsize team provides Mobile App Development, UX/UI Design, Web Development, Artificial Intelligence, and more and was launched in 2003.
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    Clients

    United Nations Volkswagen Stanley Connect Delmonte

    Industries

  • 3
    (96 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $10,000+
    250 - 999 employees
    London, England
    Webskitters, an application development firm, is located in Kolkata, India; London, England; Miami, Florida and Claymont, Delaware. The firm specializes in Mobile App Development, Web Development, E-Commerce Development, IoT development, and more and has a midsize team.The firm was launched in 2010.
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    Clients

    Mercedes-AMG

    Industries

  • 4
    (16 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    5.0

    Would Recommend

    5.0
    $10,000+
    1,000 - 9,999 employees
    London, England
    Devsinc is a large AR/VR development company. Founded in 2009, the agency is located in San Jose, California; Lahore, Pakistan; Dubai, United Arab Emirates and London, England. Their team specializes in AR/VR development, Mobile App Development, Web Development, Custom Software Development, and more.
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    Clients

    Xiaomi Levis Al-Jouf (JADCO) Al Rajhi Bank (Saudia Arabia)

    Industries

  • 5
    (104 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.8

    Value

    4.7

    Would Recommend

    4.9
    $10,000+
    250 - 999 employees
    London, England
    GeekyAnts is a midsize software development firm. Established in 2006, the agency is based in San Francisco, California; Bengaluru, India and London, England. Their team specializes in Custom Software Development, Mobile App Development, Web Development, Artificial Intelligence, and more.
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    Clients

    Siveco Romania Olive Garden Darden KhataBook

    Industries

  • 6
    (28 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    5.0
    $25,000+
    10 - 49 employees
    London, England
    Stakk is a small app development company. They specialize in Mobile App Development and UX/UI Design and were established in 2016. The firm is headquartered in London, England; Wilmington, Delaware; Amsterdam, Netherlands and Orlando, Florida.
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    Industries

  • 7
    (15 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    4.9
    $10,000+
    10 - 49 employees
    Bristol, England

    Morrow formerly known as App Sapiens is a development firm based in Bristol was founded in 2019. With less than 10 members on their team, they offer web and mobile app development as well as IT strategy consulting assistance to small businesses, using languages such as JavaScript and frameworks such as React Native, NodeJS, and ReactJS.

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    Clients

    Ownable

    Industries

  • 8
    (27 Reviews) 4.7

    Timeliness

    4.6

    Service Excellence

    4.7

    Value

    4.6

    Would Recommend

    4.8
    $5,000+
    50 - 249 employees
    London, England
    IConnect Digital Solutions Ltd is a London, England-based application development firm. They specialize in Mobile App Development, UX/UI Design, and Web Development and were launched in 2011.
    Read More

    Industries

  • 9
    (54 Reviews) 4.7

    Timeliness

    4.6

    Service Excellence

    4.6

    Value

    4.4

    Would Recommend

    4.8
    $50,000+
    1,000 - 9,999 employees
    London, England
    Kellton is a large software development company. The Reston, Virginia-based agency was established in 2009. Their services include Custom Software Development, Mobile App Development, Artificial Intelligence, BI & big data consulting & SI, and more.
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    Industries

  • 10
    (50 Reviews) 4.9

    Timeliness

    4.6

    Service Excellence

    4.8

    Value

    4.9

    Would Recommend

    4.9
    $25,000+
    50 - 249 employees
    Salford, England
    Digiryte, a software development company, is based in Salford, England; London, England and Houston, Texas. The midsize team provides Custom Software Development, Mobile App Development, and cloud consulting & SI and was founded in 2016.
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    Clients

    NHS

    Industries

  • 11
    (126 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.8

    Value

    4.6

    Would Recommend

    4.9
    $50,000+
    1,000 - 9,999 employees
    London, England
    Andersen Inc. Is a Dallas, Texas-based custom software development company. Launched in 2007, the large team offers Custom Software Development, IT managed services, Mobile App Development, IT strategy consulting, and more.
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    Clients

    Samsung

    Industries

  • 12
    (35 Reviews) 4.8

    Timeliness

    4.4

    Service Excellence

    4.7

    Value

    4.7

    Would Recommend

    4.9
    $50,000+
    10 - 49 employees
    York, England
    Launched in 2009, The Distance App Developers is an application development company. Their small team is headquartered in London, England and York, England. Their services include Mobile App Development, Product Design, and Custom Software Development.
    Read More

    Clients

    LeShuttle NHS Bentley Motors AstraZeneca

    Industries

  • 13
    (65 Reviews) 4.8

    Timeliness

    4.7

    Service Excellence

    4.8

    Value

    4.7

    Would Recommend

    4.8
    $10,000+
    10 - 49 employees
    London, England
    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.
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    Clients

    Luxury Rentals Miami Beach Sleeping Plaza Masdar KSA Jetour Qatar

    Industries

  • 14
    (14 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    4.8

    Would Recommend

    4.9
    $10,000+
    10 - 49 employees
    Manchester, England
    Application development company Foresight Mobile is based in Manchester, England; Birmingham, England and London, England. They offer Mobile App Development, Custom Software Development, Web Development, and API Development and were launched in 2016.
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    Clients

    Table.co Swrve Levi Strauss EA

    Industries

  • 15
    (50 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    4.9

    Value

    5.0

    Would Recommend

    5.0
    $10,000+
    10 - 49 employees
    London, England

    TechnoYuga Soft Pvt. Ltd., a mobile application development company, was established in 2019. Their small team is based in New Delhi, India; Surat, India; Toronto, Canada and Orland Park, Illinois. The company focuses on Mobile App Development, Custom Software Development, Web Development, Artificial Intelligence, and more.

    Read More

    Clients

    Gfacility Akasha Air mfine Decathlon

    Industries

  • 16
    (38 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.6

    Would Recommend

    5.0
    $10,000+
    50 - 249 employees
    London, England
    Thoughtbot, a web development firm, was established in 2003. They are headquartered in New York, New York and London, England and have a midsize team. Thoughtbot focuses on Web Development, Mobile App Development, UX/UI Design, cloud consulting & SI, and more.
    Read More

    Clients

    Health Match 360

    Industries

  • 17
    (17 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $10,000+
    10 - 49 employees
    London, England

    Old.St Labs is a software development business based in London. The business, founded in 2020, has a team of more than ten that provides custom software development, mobile app development, UX/UI design, web design & development, and AI services. Old.St Labs serves small and mid-market companies in the advertising & marketing, education, financial services, health care & medical, and legal industries.

    Read More

    Clients

    Kopona

    Industries

  • 18
    (25 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    5.0
    $5,000+
    10 - 49 employees
    London, England

    Inventiff is a website development firm. Established in 2019, the small firm is headquartered in London, United Kingdom and Cluj-Napoca, Romania. Their services include web development, mobile app development, web design, ux/ui design, and more.

    Read More

    Industries

  • 19
    (93 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.8

    Value

    4.7

    Would Recommend

    5.0
    $25,000+
    1,000 - 9,999 employees
    London, England
    Launched in 2002, Vention is a custom software development firm. They are based in New York, New York; Marietta, Georgia; Woodbridge Township, New Jersey and London, England and have a large team. Their services include Custom Software Development, Web Development, IT staff augmentation, Mobile App Development, and more.
    Read More

    Clients

    IBM PayPal pwc IC Markets

    Industries

  • 20
    (123 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $25,000+
    50 - 249 employees
    London, England
    Launched in 2013, Empat is an app development company. The midsize San Francisco, California-based team focuses on Mobile App Development, Web Development, and Custom Software 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

  • 21
    (35 Reviews) 4.7

    Timeliness

    4.7

    Service Excellence

    4.7

    Value

    4.8

    Would Recommend

    4.8
    $10,000+
    50 - 249 employees
    London, England
    Nimblechapps Pvt. Ltd. Is a mobile app development company headquartered in Ahmedabad, India; Austin, Texas and London, England. They offer Mobile App Development and Web Development and were established in 2014.
    Read More

    Clients

    Strom Motors

    Industries

  • 22
    (23 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    4.9

    Would Recommend

    5.0
    $10,000+
    10 - 49 employees
    London, England
    Based in London, England; Plymouth, England; Edinburgh, Scotland and Manchester, England, Coreblue is a custom software development firm. The small team specializes in Custom Software Development, Mobile App Development, IT strategy consulting, Low/No Code Development, and more and was founded in 2015.
    Read More

    Clients

    Bank of Kigali Executive Nexus ProConvey

    Industries

  • 23
    (43 Reviews) 4.7

    Timeliness

    4.7

    Service Excellence

    4.7

    Value

    4.8

    Would Recommend

    4.8
    $10,000+
    250 - 999 employees
    London, England
    SoftProdigy is a custom software development company. Established in 2006, the company is located in Sahibzada Ajit Singh Nagar, India; London, England and Great Neck, New York. The midsize team focuses on Custom Software Development, Mobile App Development, Artificial Intelligence, cloud consulting & SI, and more.
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    Clients

    Deloitte

    Industries

  • 24
    (19 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.8

    Value

    4.8

    Would Recommend

    4.9
    $10,000+
    250 - 999 employees
    London, England
    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.
    Read More

    Clients

    Abbott BOSCH KPMG Western Union

    Industries

  • 25
    (15 Reviews) 4.9

    Timeliness

    4.7

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $10,000+
    2 - 9 employees
    London, England

    Ingenious App Studios is a mobile app development firm based in London. Founded in 2018, their team of 8 serves clients in the internet and IT sectors. Services include web development.

    Read More

    Clients

    MFP App

    Industries

  • 26
    (84 Reviews) 4.6

    Timeliness

    4.5

    Service Excellence

    4.6

    Value

    4.6

    Would Recommend

    4.6
    $5,000+
    1,000 - 9,999 employees
    London, England
    Dotsquares, a cloud consulting & SI company, was founded in 2002. Located in London, England; Mount Waverley, Australia; Albourne, England and Jaipur, India, their large team specializes in cloud consulting & SI, CRM consulting and SI, ERP consulting and SI, IT managed services, and more.
    Read More

    Clients

    Ericsson

    Industries

  • 27
    (13 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $10,000+
    50 - 249 employees
    London, England

    Kernelics is a software development company founded in 2020 with over 50 employees. They provide web development, mobile app development, and AI solutions from their office in Minsk, Belarus. They work with small businesses across various industries.

    Read More

    Industries

  • 28
    (17 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.7

    Would Recommend

    4.9
    $10,000+
    2 - 9 employees
    London, England
    App development company Binary Mango was launched in 2016. Headquartered in London, England, their small team provides Mobile App Development, Custom Software Development, Artificial Intelligence, and Blockchain.
    Read More

    Clients

    GetLeslie

    Industries

  • 29
    (6 Reviews) 4.9

    Timeliness

    4.6

    Service Excellence

    4.8

    Value

    4.3

    Would Recommend

    4.9
    $25,000+
    2 - 9 employees
    Plymouth, England

    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.

    Read More

    Industries

  • 30
    (10 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    4.8

    Would Recommend

    5.0
    $10,000+
    10 - 49 employees
    Edinburgh, Scotland

    GearedApp is a software development firm based in Edinburgh, Scotland. They were founded in 2013 and have a team of 11 employees who specialize in mobile development, web development, and UX/UI design. They work mostly with small business clients in the healthcare, business services, and education industries.

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    Clients

    NHS

    Industries

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