Top iPhone App Development Companies in London
London’s mix of global enterprises, fintech disruptors in Canary Wharf, and innovators clustered around Silicon Roundabout makes the city a premier hub for iOS talent. A skilled iPhone app development agency can turn a concept into an App Store-ready product—covering UX, Swift coding, QA, and post-launch maintenance.
Clutch simplifies your search by gathering detailed client reviews, project metrics, and verified ratings on leading London studios. Sort providers by hourly rate, team size, or industry expertise, and apply filters to zero in on the partners that match your budget and goals.
For a broader view, explore the Top iPhone App Development Companies worldwide, compare UK leaders on Top iPhone App Developers in the UK, or see London specialists for Healthcare apps.
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$50,000+$100 - $149 / hr10 - 49Serves London, EnglandServices provided
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See all 39 projectsTepia is a Mobile App Development company specializing in creating tailored mobile applications and platforms for iOS and Android. Their reviews are overwhelmingly positive, with 100% of users highlighting their professionalism, responsiveness, and technical expertise. Tepia's dedication to understanding client needs and proactive problem-solving is frequently praised, with 90% of reviewers noting smooth project management and effective communication. Tepia stands out for its ability to integrate complex features while maintaining user-friendly design.
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$100,000+$25 - $49 / hr50 - 249London, England
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See all 10 projectsInfinity Technologies is a web development company recognized for its expertise in building scalable, high-performance websites. Their reviews highlight strong technical proficiency, proactive problem-solving, and effective communication. With 100% of reviewers noting their professionalism and expertise, Infinity Technologies demonstrates a solid capability to deliver tailored web solutions promptly.
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$25,000+$25 - $49 / hr50 - 249London, England
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See all 13 projects2Base Technologies is a Mobile App Development company renowned for delivering high-quality web and mobile applications, particularly in iOS and Android Development. Across their reviews, 100% of clients praise their proactive, energetic approach and effective communication. Clients consistently highlight their exceptional value for money and robust project management, with no reported areas for improvement.
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$5,000+$25 - $49 / hr10 - 49London, England
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See all 39 projectsinternetum is a versatile mobile app development company known for its deep expertise in fintech and AI-powered solutions. Reviews highlight their exceptional project management, timely delivery, and responsive communication, with 100% positive feedback. Clients commend their seamless integration of complex features and user-friendly designs, with 90% noting the alignment of technical solutions with business needs.
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$10,000+$50 - $99 / hr10 - 49Watford, England
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See all 18 projectsWirebox Ltd is a proficient Mobile Application Development company known for delivering robust and scalable solutions across iOS and Android platforms. The company has received overwhelmingly positive feedback, with 100% of reviewers praising their communication and project management skills. Clients commend their ability to provide innovative solutions while maintaining timely delivery, making them a reliable partner for complex development projects.
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$5,000+$25 - $49 / hr250 - 999London, England
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See all 166 projectsKonstant Infosolutions is a Mobile App Development company specializing in iOS and Android Development. The reviews reveal a mixed reception, with approximately 60% of feedback highlighting effective communication and responsiveness, while around 40% report delays and technical issues. Clients often commend their flexibility in adapting to project needs, though some express concerns with management efficiency and code delivery.
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$25,000+$50 - $99 / hr50 - 249London, England
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See all 45 projectsSynergy Labs is a mobile app development company that delivers a wide range of services, including iOS and Android development, mobile software engineering, and app design. Reviews indicate a high level of satisfaction, with several clients praising their technical expertise, project management, and ability to deliver solutions tailored to specific needs. Positive feedback constitutes approximately 87% of reviews, highlighting their responsiveness and seamless integration capabilities, while only 13% of feedback notes areas for potential improvement, such as the use of detailed documentation.
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$25,000+$100 - $149 / hr10 - 49London, England
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See all 24 projectsBrightec is a distinguished mobile app development company, excelling in iOS and Android app creation. With a focus on seamless UX and technical innovation, they consistently deliver projects on time, as highlighted by 100% of their reviews. Their commitment to integrating client visions into functional apps is lauded, with around 90% of clients noting their proactive and collaborative approach.
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$50,000+$100 - $149 / hr2 - 9London, England
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See all 30 projectsArch is a proficient mobile app development company, widely praised for its responsive project management and ability to deliver projects on time and within budget. They excel in creating engaging and scalable applications, with 87% of reviews noting their proactive communication and attentiveness to client needs. Clients frequently commend their ability to align with business goals, suggesting a strong cultural fit and understanding of client industries.
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$25,000+$25 - $49 / hr10 - 49London, England
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See all 3 projectsDEVITGROUP LTD is a development company specializing in creating scalable and reliable software solutions, such as online learning platforms and desktop applications for real-time monitoring. They have received overwhelmingly positive feedback, with both clients praising their project management, timely delivery, and ability to understand business goals, although one suggested additional edge case testing. Approximately 100% of reviewers highlighted their effective communication and responsiveness.
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$25,000+$50 - $99 / hr10 - 49London, England
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See all 33 projectsExyte is a versatile mobile app development firm known for its expertise in iOS and Android app creation, often integrating advanced technologies such as blockchain and AR. Reviewers highlight their professionalism, timely delivery, and strong project management skills, with 100% of reviews indicating satisfaction with the quality of their work and effective communication. Clients value their responsive approach, suggesting Exyte is a reliable partner for mobile app development projects.
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$25,000+$25 - $49 / hr250 - 999London, England
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See all 82 projectsTekRevol is a comprehensive Mobile App Development company specializing in iOS and Android applications, with additional capabilities in web and software development. Based on the reviews, 90% of users appreciate their project management, communication, and customer service, while only one review indicated a significant delay in project delivery. The company is noted for its professionalism, responsiveness, and ability to adapt to client needs, making them a strong contender for mobile software engineering projects.
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$100,000+$25 - $49 / hr50 - 249London, England
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See all 10 projectsN-iX Games is a software development company specializing in game and virtual reality projects with a strong focus on 3D pipelines and unity game development. Clients praise their deep understanding of 3D art, imagination, and responsiveness, with a 100% positive feedback rate regarding their partnership spirit and trustworthiness. However, there is feedback suggesting room for improvement in software engineering skills.
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$50,000+$100 - $149 / hr50 - 249Reigate, England
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See all 27 projectsSonin App Development is a mobile app development company with expertise in iOS and Android development, offering comprehensive services from design to deployment. Reviews consistently highlight their strong project management, with 100% of reviewers appreciating their communication and timeliness. Additionally, 90% of clients commend their proactive approach and ability to deliver high-quality, user-friendly apps efficiently, demonstrating superior customer service and technical expertise.
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$25,000+$25 - $49 / hr250 - 999London, England
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See all 82 projectsComputools is a versatile company specializing in mobile app development, offering services in both iOS and Android development. Across a majority of reviews, the company receives positive feedback for delivering scalable, user-friendly applications on time and within budget, with 88% of clients highlighting their strong project management and technical execution. However, one review indicated significant challenges, including delays and quality issues in a project.
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$25,000+$50 - $99 / hr250 - 999London, England
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See all 37 projectsVega IT is a mobile app development company known for its comprehensive range of services, including iOS and Android development, web development, and backend support. While their professional culture and commitment to quality are praised by the majority of reviews, one negative experience highlights issues with project management and customer relations. Approximately 85% of the feedback is positive, with customers appreciating Vega IT's flexibility, expertise, and ability to scale development teams efficiently.
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$1,000+$25 - $49 / hr50 - 249London, England
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See all 19 projectsLogicspice Consultancy Pvt Ltd. is a proficient company specializing in Mobile App Development, particularly adept in iOS and Android Development. The company has received overwhelmingly positive feedback, with clients praising their prompt communication, technical expertise, and ability to incorporate complex features into apps. Approximately 90% of reviewers commend their flexibility and commitment to delivering high-quality products within budget constraints.
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$50,000+$150 - $199 / hr10 - 49London, England
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See all 12 projectsBoldheart is a distinguished company specializing in Mobile App Development, offering services that encompass UX/UI design, technical development, and product management. They receive overwhelmingly positive feedback, with clients highlighting their strategic mindset, adaptability, and exceptional project management. Approximately 90% of reviewers commend their innovative approach and deep understanding of brand and user experience.
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$75,000+$150 - $199 / hr10 - 49Otford, England
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See all 3 projectsecce. is a technology solutions company specializing in database management, API web services, and interface design. Their consistent ability to deliver projects on time with exceptional project management and clear communication is highlighted across their reviews. Notably, 100% of clients mention their adaptability and customer-centric approach as key strengths, with no negative feedback reported.
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$10,000+$25 - $49 / hr10 - 49London, England
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See all 12 projectsHeadChannel Consulting is a mobile app development company known for creating adaptable and user-friendly mobile application solutions. With a 4.3 average rating among approximately 1,000 users, 100% of the feedback highlights their strong project management and innovative approach to mobile software engineering. They are particularly praised for translating client visions into practical applications that exceed expectations.
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$1,000+< $25 / hr50 - 249City Business Centre , England
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See all 9 projectsDreams Technologies, UK & India specializes in Mobile App Development, offering comprehensive solutions for CRM systems and telemedicine apps. Their reviews highlight a remarkable 100% satisfaction rate, noting their professionalism, proactive approach, and timely delivery. Clients consistently praise their ability to exceed expectations and efficiently manage projects, demonstrating expertise in mobile software development.
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$50,000+Undisclosed10 - 49London, England
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Atomic Build is a software development firm launched in 2021. The team offers Custom Software Development and Mobile App Development.
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$25,000+$25 - $49 / hr10 - 49High Wycombe, England
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See all 6 projectsEvangelist Apps is a prominent Mobile App Development company specializing in iOS and Android Development. They consistently receive high praise for their expertise, flexibility, and proactive approach, as reflected in their client reviews. Over 90% of clients commend their ability to deliver high-quality solutions on time and within budget, emphasizing their effective communication and project management skills.
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$1,000+$25 - $49 / hr1,000 - 9,999London, England
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See all 95 projectsDotsquares is a versatile software development company specializing in mobile app development, including iOS and Android platforms. The company is highly praised for its project management, professionalism, and customer service, with around 90% of reviews highlighting their punctuality and efficient communication. Their commitment to delivering value for cost and the ability to align with client values and needs is frequently noted, making them a highly recommended choice for app development projects.
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$50,000+$25 - $49 / hr1,000 - 9,999London, England
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See all 36 projects10Pearls is a versatile technology company specializing in Mobile App Development, web application development, and comprehensive digital solutions. The firm is commended for delivering projects on time and within budget, with 100% of reviews highlighting their adaptability and professionalism. Clients appreciate their skilled team and effective communication. Opportunities for improvement were minor, with 10Pearls consistently exceeding expectations.
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$25,000+$50 - $99 / hr250 - 999London, England
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See all 26 projectsRobosoft Technologies Inc. is a prominent company specializing in Mobile App Development, offering services across various platforms, including iOS and Android. The reviews reveal consistent positive feedback, with approximately 95% of clients praising their punctuality, quality output, and collaborative approach. Their ability to meet deadlines, deliver high-quality applications, and adapt to customer needs stands out, making them a reliable partner for businesses seeking robust mobile solutions.
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$50,000+$25 - $49 / hr1,000 - 9,999London, England
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See all 54 projectsKellton is a technology solutions provider specializing in Mobile App Development, including iOS and Android development. Customer reviews highlight their responsiveness, timely delivery, and strong project management skills, with a notable emphasis on their ability to work seamlessly with clients. Approximately 80% of feedback reflects satisfaction in their efficiency and communication, although some suggest improvement in industry-specific expertise and proactive problem-solving.
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$100,000+$100 - $149 / hr250 - 999London, England
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See all 29 projectsApadmi is a mobile app development company specializing in iOS and Android platforms. They receive overwhelmingly positive feedback for their expertise and professionalism, with approximately 90% of reviewers highlighting their technical proficiency and engagement. Clients appreciate their agility and dedication to understanding project goals beyond technical requirements, though some note minor issues with internal changes and communication.
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$10,000+$25 - $49 / hr250 - 999London, England
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See all 19 projectsSENLA is a software development company specializing in mobile app and backend development, known for its expertise in Mobile App Development, iOS Development, and Android Development. Across various projects, SENLA received overwhelmingly positive feedback, with clients highlighting their professionalism, excellent communication, and ability to deliver high-quality, user-friendly applications. Notably, 100% of reviewers praised their project management and timely delivery, underscoring their reliability and commitment to client satisfaction.
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$25,000+$25 - $49 / hr1,000 - 9,999St Albans, England
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See all 5 projectsFCamara is an IT services company specializing in digital transformation, DevOps, infrastructure management, and AI technology development. A common theme in the reviews is their ability to deliver projects on time and their strong technical expertise. Reviewers praise their effective communication and seamless integration with client teams, with 100% positive feedback on their professionalism and project outcomes.
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$5,000+$25 - $49 / hr250 - 999London, England
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See all 5 projectsBSS Commerce is a specialist in Magento development and e-commerce solutions, known for providing comprehensive audits, solution consultation, and website redevelopment. The company has garnered overwhelmingly positive feedback, with clients praising their professionalism, responsiveness, and technical expertise, while highlighting their ability to meet deadlines and budget constraints. Approximately 100% of the reviews commend their proactive approach and effective project management.
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$10,000+$25 - $49 / hr10 - 49London, England
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See all 12 projectsTopDevs is a proficient Mobile App Development company specializing in iOS and Android development. With a focus on delivering intuitive and efficient applications, they have garnered near-universal acclaim across their reviews. Approximately 100% of clients highlight their adherence to deadlines and exceptional communication, with no negative feedback reported. Their expertise in mobile software engineering is consistently praised, contributing to successful and smoothly managed projects.
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$1,000+< $25 / hr1,000 - 9,999London, England
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See all 3 projectsZerocoder is a web development company known for delivering innovative and user-friendly solutions, such as websites and licensing modules, tailored to client needs. Across their reviews, 100% of clients praised their professionalism, communication, and ability to enhance visions with creativity. They consistently provided high value for cost, with no reported areas for improvement from their clients.
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$10,000+$25 - $49 / hr250 - 999London, England
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See all 43 projectsSoftProdigy is a versatile mobile app development company specializing in creating tailored solutions for iOS and Android platforms. The company receives overwhelmingly positive feedback, with clients frequently praising their expertise, responsiveness, and timely project delivery. Approximately 95% of reviewers commend their effective communication and problem-solving skills, making them a reliable partner for smartphone app development projects.
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$50,000+$150 - $199 / hr250 - 999London, England
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See all 18 projectsMethod is a company offering mobile app development services, specializing in creating custom applications for iOS and Android platforms. Reviews highlight their exceptional project management, with no reported issues and commendations for their personnel, particularly Tiffany, Danny, and Paul. The feedback is overwhelmingly positive, with a strong emphasis on the team's passion and collaboration, contributing to a seamless working relationship.
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$10,000+$50 - $99 / hr50 - 249London, England
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See all 25 projectsStudio Graphene is a versatile mobile app development company known for delivering comprehensive app solutions, including iOS and Android development, with a focus on MVP creation and ongoing iteration. Approximately 85% of reviewers appreciate their professionalism and proactive approach, while 70% highlight excellent project management. Communication is a noted area for improvement, mentioned by 30% of users.
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List of the Top 15 London iPhone and iOS App Development Companies
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$50,000+$25 - $49 / hr250 - 999San Francisco, CA
Ability to deliver
40/40.020/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
50% Mobile App Development40% iPhone iOS App Development50% Other -
$5,000+$25 - $49 / hr50 - 249Cluj-Napoca, Romania
Ability to deliver
39.2/40.019.6/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
50% Mobile App Development50% iPhone iOS App Development50% Other -
$25,000+$50 - $99 / hr10 - 49Miami, FL
Ability to deliver
36.8/40.017.2/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
80% Mobile App Development70% iPhone iOS App Development20% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Warszawa, Poland
Ability to deliver
39.3/40.020/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
15% Mobile App Development25% iPhone iOS App Development85% Other -
$25,000+$25 - $49 / hr250 - 999Houston, TX
Ability to deliver
37.2/40.017.4/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
40% Mobile App Development30% iPhone iOS App Development60% Other -
$1,000+$25 - $49 / hr1,000 - 9,999London, England
Ability to deliver
39.2/40.019.8/20 Reviews9.6/10 Clients & Experience9.8/10 Market PresenceService focus
15% Mobile App Development25% iPhone iOS App Development85% Other -
$50,000+$150 - $199 / hr250 - 999New York, NY
Ability to deliver
39/40.019/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
20% Mobile App Development40% iPhone iOS App Development80% Other -
$50,000+$25 - $49 / hr1,000 - 9,999Vienna, VA
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37.6/40.017.8/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
20% Mobile App Development40% iPhone iOS App Development80% Other -
$25,000+$50 - $99 / hr250 - 999San Francisco, CA
Ability to deliver
36.8/40.017/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
50% Mobile App Development30% iPhone iOS App Development50% Other -
$50,000+$25 - $49 / hr1,000 - 9,999Reston, VA
Ability to deliver
37.2/40.017.4/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
20% Mobile App Development30% iPhone iOS App Development80% Other -
$50,000+$50 - $99 / hr1,000 - 9,999New York, NY
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
10% Mobile App Development50% iPhone iOS App Development90% Other -
$10,000+$25 - $49 / hr250 - 999Kolkata, India
Ability to deliver
39/40.020/20 Reviews9.8/10 Clients & Experience9.2/10 Market PresenceService focus
30% Mobile App Development20% iPhone iOS App Development70% Other -
$100,000+$100 - $149 / hr250 - 999Salford, England
Ability to deliver
35.5/40.015.6/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
60% Mobile App Development40% iPhone iOS App Development40% Other -
$1,000+< $25 / hr50 - 249Hertfordshire, England
Ability to deliver
39.2/40.020/20 Reviews9.9/10 Clients & Experience9.3/10 Market PresenceService focus
35% Mobile App Development35% iPhone iOS App Development65% Other -
$100,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
37.1/40.017.2/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
50% Mobile App Development25% iPhone iOS App Development50% Other -
$10,000+$25 - $49 / hr250 - 999Warszawa, Poland
Ability to deliver
37.4/40.017.8/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
15% Mobile App Development35% iPhone iOS App Development85% Other -
$10,000+$25 - $49 / hr250 - 999San Francisco, CA
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
25% Mobile App Development10% iPhone iOS App Development75% Other -
$25,000+< $25 / hr1,000 - 9,999Ahmedabad, India
Ability to deliver
37.3/40.017.4/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
10% Mobile App Development40% iPhone iOS App Development90% Other -
$10,000+$25 - $49 / hr250 - 999Stuttgart, Germany
Ability to deliver
38.4/40.018.8/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
10% Mobile App Development30% iPhone iOS App Development90% Other -
$10,000+$150 - $199 / hr50 - 249New York, NY
Ability to deliver
37.4/40.018/20 Reviews10/10 Clients & Experience9.4/10 Market PresenceService focus
25% Mobile App Development40% iPhone iOS App Development75% Other -
$10,000+$50 - $99 / hr50 - 249Rīga, Latvia
Ability to deliver
35.8/40.017.4/20 Reviews10/10 Clients & Experience8.4/10 Market PresenceService focus
30% Mobile App Development45% iPhone iOS App Development70% Other -
$25,000+$25 - $49 / hr1,000 - 9,999São Paulo, Brazil
Ability to deliver
36.3/40.016.6/20 Reviews9.9/10 Clients & Experience9.8/10 Market PresenceService focus
10% Mobile App Development40% iPhone iOS App Development90% Other -
$5,000+$25 - $49 / hr250 - 999Hanoi, Vietnam
Ability to deliver
35.6/40.016.4/20 Reviews9.2/10 Clients & Experience9.9/10 Market PresenceService focus
15% Mobile App Development40% iPhone iOS App Development85% Other -
$25,000+$50 - $99 / hr10 - 49London, England
Ability to deliver
36.3/40.017.2/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
65% Mobile App Development20% iPhone iOS App Development35% Other -
$25,000+$25 - $49 / hr50 - 249London, England
Ability to deliver
37.2/40.017.4/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
20% Mobile App Development40% iPhone iOS App Development80% Other -
$10,000+$25 - $49 / hr10 - 49London, England
Ability to deliver
34.5/40.016.4/20 Reviews10/10 Clients & Experience8.2/10 Market PresenceService focus
40% Mobile App Development55% iPhone iOS App Development60% Other -
$1,000+< $25 / hr1,000 - 9,999Roseville, CA
Ability to deliver
31.7/40.016.4/20 Reviews9.9/10 Clients & Experience5.4/10 Market PresenceService focus
25% Mobile App Development35% iPhone iOS App Development75% Other -
$25,000+$25 - $49 / hr50 - 249Alexandria, VA
Ability to deliver
37.5/40.020/20 Reviews8.1/10 Clients & Experience9.4/10 Market PresenceService focus
30% Mobile App Development25% iPhone iOS App Development70% Other -
$50,000+$100 - $149 / hr50 - 249Reigate, England
Ability to deliver
32.8/40.016.4/20 Reviews10/10 Clients & Experience6.4/10 Market PresenceService focus
70% Mobile App Development40% iPhone iOS App Development30% Other -
$10,000+$25 - $49 / hr250 - 999Sahibzada Ajit Singh Nagar, India
Ability to deliver
35.3/40.015.8/20 Reviews9.7/10 Clients & Experience9.8/10 Market PresenceService focus
25% Mobile App Development20% iPhone iOS App Development75% Other
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London iPhone App Developer FAQs
Choosing a local partner offers more than shared time zones. London-based iOS app development firms work at the crossroads of design and finance, drawing insight from nearby corporate headquarters (Barclays, HSBC) as well as cutting-edge startups in Shoreditch.
Moreover, face-to-face workshops accelerate discovery sprints, and local teams stay up to date through events like London Tech Week and the Apple Developer Meet-Up scene. If your target market is the UK or Europe, London agencies also understand GDPR nuances and regional payment integrations, helping you launch faster with fewer compliance headaches.
London rates vary with project scope, complexity, and agency pedigree, but most Clutch-listed agencies charge:
- Small studios: £70 – £110 per hour (approximately $90 – $140)
- Mid-size agencies: £110 – £160 per hour (approximately $140 – $200)
- Top-tier consultancies: £160+ per hour (approximately $200+)
A feature-rich iPhone app often runs £50,000 – £150,000, while a lean MVP can start around £25,000. Remember to budget for ongoing updates and App Store maintenance, which many agencies offer on a retainer basis.
London’s diverse economy means agencies tackle projects across sectors, including:
- Fintech and digital banking
- Health tech and digital therapeutics
- E-commerce and retail loyalty
- Media, entertainment, and sports streaming
- Travel, transport, and mobility solutions
- Education and e-learning platforms
Start by mapping out goals—MVP vs. full product, native vs. cross-platform, B2C vs. enterprise. Then review agency profiles for:
- Relevant case studies and App Store links
- Client feedback scores on Clutch
- Tech stack expertise (Swift, SwiftUI, Objective-C)
- Experience with your industry or required integrations (e.g., Apple Pay, HealthKit)
- Transparent project management tools and communication cadence
Shortlist 3–5 firms, request proposals with timelines and cost breakdowns, and ask for a technical lead on calls to gauge problem-solving depth. If you're struggling to narrow your search, take advantage of the resources and filters we have prepared on Clutch.
Red flags can cause headaches and setbacks down the line if not avoided early. When searching for potential partners, watch out for:
- Fixed-price quotes without a discovery phase
- Reluctance to provide client references or App Store examples
- No clear plan for App Store submission, ASO, or post-launch support
- Over-promising timelines (a complex app ready in 4 weeks)
- Generic proposals that ignore your unique user flows or compliance needs