Top Cross Platform App Developers
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$5,000+$25 - $49 / hr10 - 49Da Nang, Vietnam
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See all 4 projectsEnable Startup is a Mobile App Development company known for its expertise in creating innovative solutions, such as no-gas cryptocurrency wallets. The company is praised for its detailed planning and adherence to agile methodologies, with 100% of reviews highlighting their successful project outcomes and strong communication skills. However, documentation quality could be improved.
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$10,000+$100 - $149 / hr50 - 249Irvine, CA
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See all 8 projectsNOVVUM is a versatile software development company specializing in web development, mobile app design, and technical consulting. The company receives overwhelmingly positive feedback, with clients praising its effective communication, project management, and ability to meet tight deadlines. Approximately 90% of reviews highlight NOVVUM's technical expertise and customer-centric approach, emphasizing their commitment to understanding and fulfilling client needs.
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$5,000+$100 - $149 / hr2 - 9Calgary, Canada
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See all 15 projectsCalibre Consulting is a Mobile App Development company specializing in creating custom applications for both iOS and Android platforms. They received positive feedback for their professional and efficient service, with 100% of reviewers appreciating their responsiveness and customer engagement. Some challenges included project delays due to resource constraints, but overall, clients noted their adaptability and commitment to quality.
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$25,000+$25 - $49 / hr10 - 49Yerevan, Armenia
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See all 14 projectsNextStack is a mobile app development company that excels in creating iOS and Android applications. Across the reviews, 90% highlight their technical expertise, timely delivery, and proactive approach. Clients praise their flexibility, communication, and ability to provide creative solutions and high-quality results, with 85% noting a strong alignment of company culture and values.
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$10,000+$50 - $99 / hr10 - 49Novi Sad, Serbia
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See all 1 projectsCrystal Pigeon is a proficient mobile app development company specializing in iOS and Android application development. The company is praised for its diligent and efficient approach, with 100% of reviewers highlighting their professionalism and on-time delivery. Clients commend their exceptional app development skills and smooth cooperation, recommending them for future projects.
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$10,000+$50 - $99 / hr10 - 49Raleigh, NC
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See all 12 projectsZRIX is a comprehensive web development and IT services company focusing on building and managing websites and applications across various CMS platforms like Drupal and WordPress. The feedback from clients is overwhelmingly positive, with approximately 97% praising their timely delivery, reliability, and strong project management skills. Many clients (around 85%) commend ZRIX for their customer-centric approach and ability to tackle both major and minor tasks with efficiency and professionalism.
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$1,000+$50 - $99 / hr10 - 49Toronto, Canada
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See all 10 projectsMeevo Digital is a web development and digital solutions firm known for its expertise in creating custom websites, e-commerce platforms, and client portals. The company consistently receives high praise for its technical knowledge, quick response times, and effective project management. Approximately 90% of reviewers highlight their impressive communication and attention to detail, with no significant areas for improvement noted.
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$5,000+$25 - $49 / hr10 - 49Calgary, Canada
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See all 24 projectsDesigno Graphy is a versatile digital solutions company specializing in web development, digital marketing, and app development. The company consistently receives positive feedback, with approximately 90% of reviewers highlighting their responsiveness and effective communication. Clients commend their project management skills and adherence to deadlines, although a few suggest more transparency in data provision. Overall, Designo Graphy is praised for aligning with clients' needs and delivering quality outcomes.
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$10,000+$25 - $49 / hr10 - 49Lahore, Pakistan
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See all 7 projectsXISLABS Pvt Ltd is a mobile app development company praised for its technical expertise and project management capabilities. Approximately 100% of the reviews highlight their on-time delivery, responsiveness, and effective communication. Clients commend XISLABS Pvt Ltd for their dedication, flexibility, and ability to deliver cost-effective solutions, demonstrating significant improvements in efficiency and customer satisfaction.
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$5,000+$25 - $49 / hr250 - 999Vienna, VA
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See all 14 projectsAccubits Technologies Inc is a Mobile App Development company specializing in native iOS and Android applications. Customer feedback highlights their hands-on approach and strong collaboration, with 100% of reviewers praising their professionalism and ability to understand and define project requirements. They are noted for delivering high-quality applications and maintaining excellent project management, despite initial international coordination challenges.
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$5,000+$25 - $49 / hr10 - 49Ahmedabad, India
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See all 2 projectsAppegic specializes in Mobile App Development, including iOS and Android Development. Reviews highlight their dedication, effective project management, and successful application deployment, exemplified by a project that achieved significant user engagement with 100,000 downloads within three months. Clients commend Appegic for their valuable inputs and outstanding service quality.
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$10,000+$100 - $149 / hr10 - 49King of Prussia, PA
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See all 6 projectsFynydd is a technology solutions company specializing in custom web development, SaaS platforms, and IT infrastructure services. With a focus on flexibility and understanding client needs, 100% of reviews highlight their responsive project management and ability to tailor solutions effectively. Clients praise Fynydd's commitment to timely delivery and ongoing support, making them a trusted partner for complex technical challenges.
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$10,000+$25 - $49 / hr10 - 49Cherkasy, Ukraine
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See all 7 projectsPixelGrow is a Mobile App Development company specializing in creating tailored mobile solutions, including iOS and Android development. Clients praise their efficient communication, problem-solving abilities, and deep understanding of project needs. An impressive 100% of reviewers commend their responsiveness and the high quality of their app functionalities and user experience.
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$50,000+Undisclosed50 - 249Berlin, Germany
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See all 2 projectsMVP Factory is a leading Mobile App Development company specializing in iOS and Android Application Development. They have consistently demonstrated technical excellence, with 100% of reviewers praising their project management skills and rapid response times. A notable 95% customer satisfaction rate highlights their effectiveness in delivering high-quality smartphone software development solutions.
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$50,000+$100 - $149 / hr2 - 9New York, NY
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See all 7 projectsbromin7, Inc. is a versatile mobile app development company specializing in iOS and Android application development. They receive highly positive feedback for their commitment and professionalism, with 80% of reviewers highlighting their strong project management and effective communication. Clients particularly appreciate their ability to exceed expectations and their proactive approach, although a few noted room for improvement in aligning the end product with client visions.
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$1,000+< $25 / hr50 - 249Jodhpur, India
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See all 10 projectsAJM Softwares is a Mobile App Development company known for its responsive and adaptable approach to projects, as reflected in their 100% positive review. Clients commend their performance optimization skills, resulting in over a 50% improvement in app speed, and highlight their exceptional project management and timely delivery.
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$10,000+$25 - $49 / hr250 - 999Bengaluru, India
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See all 1 projectsDxMinds Innovation Labs Pvt Ltd is a Mobile App Development company specializing in creating mobile applications for both Android and iOS platforms. The feedback from their clients is overwhelmingly positive, highlighting the company's outstanding performance, responsiveness, and focus on customer requirements, with 100% of reviewers expressing complete satisfaction with the collaboration and workflow.
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$5,000+$25 - $49 / hr50 - 249Ahmedabad, India
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See all 16 projectsVariance Infotech Pvt LTD is a proficient Mobile App Development company recognized for its seamless integration of mobile solutions with existing systems, specializing in both iOS and Android Development. Their reviews reflect an overwhelmingly positive sentiment, with clients commending the company's efficient communication, timely delivery, and reliable support, with 100% of reviewers highlighting excellent project management and responsiveness to client needs.
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$5,000+$50 - $99 / hr10 - 49Puchong, Malaysia
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See all 2 projectsSegWitz specializes in Mobile App Development, particularly for iOS and Android platforms. The overall feedback highlights their proficiency and creativity in providing effective solutions, although there are suggestions for improving development timeliness. Clients appreciate their cooperative nature and the ability to understand and address potential problems promptly.
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$5,000+< $25 / hr2 - 9Panaji, India
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See all 4 projectsCopperCodes is a Mobile App Development company that specializes in delivering tailored mobile solutions, including iOS and Android Development. With a strong emphasis on communication and technical expertise, CopperCodes has consistently impressed clients, as evidenced by a high satisfaction rate where nearly all reviews highlight their professionalism and seamless project execution. Reviewers commend their effective use of machine learning and data analysis to enhance app functionality.
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$5,000+$25 - $49 / hr50 - 249Delhi, India
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See all 54 projectsE-Sutra Technologies Private Limited is a specialized Mobile App Development company recognized for its comprehensive development services across Android and iOS platforms. With 100% positive feedback, clients commend their deep technical expertise, proactive communication, and ability to create user-friendly, scalable applications. Approximately 75% of reviews highlight their exceptional project management and alignment with client business needs.
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$25,000+$100 - $149 / hr10 - 49Toronto, Canada
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See all 15 projectsQuantum Mob - Out of Business was a mobile app development company specializing in frontend and cross-platform solutions. Reviews consistently highlight their exceptional design and engineering skills, with 100% of clients praising their professionalism and communication. Notably, their ability to quickly grasp complex business needs and deliver beyond the expected scope was frequently commended, although minor issues with availability post-project and invoicing were mentioned.
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$5,000+$50 - $99 / hr10 - 49Plovdiv, Bulgaria
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See all 2 projectsPlatform Devs is a Mobile App Development company specializing in creating and maintaining applications from the ground up. Garnering 100% positive feedback, clients praise their responsiveness and seamless project management, noting significant improvements in business processes. This demonstrates their proficiency in application development and customer satisfaction.
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$5,000+$50 - $99 / hr10 - 49HALNDLE BCH, FL
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See all 4 projectsJett is a multifaceted digital agency specializing in web development, UI/UX design, and brand development services. Across reviews, they are consistently praised for their high-quality deliverables, efficient project management, and strategic approach, with 100% positive feedback on their ability to exceed expectations and adapt to changing needs. Approximately 75% of reviewers highlight Jett's impressive communication and commitment to client success.
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$10,000+< $25 / hr10 - 49Noida, India
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See all 10 projectsUcodice Technologies Private Limited is a mobile application development company specializing in delivering tailored solutions for both iOS and Android platforms. Their projects demonstrate a commitment to quality and client satisfaction, with reviews highlighting professional workflows and smart problem-solving approaches. Approximately 100% of the reviews reflect positive feedback, emphasizing their dedication and effective communication.
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$1,000+< $25 / hr50 - 249Kochi, India
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See all 4 projectsInter Smart is a versatile web development and digital marketing company, specializing in web development, SEO, and social media management. Client feedback is overwhelmingly positive, with 100% of reviewers highlighting their approachable and reliable nature, timely delivery, and budget-friendly solutions. Their comprehensive service and strong communication skills make them a sought-after partner for digital projects.
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$10,000+$50 - $99 / hr50 - 249Zagreb, Croatia
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See all 30 projectsUndabot is a distinguished mobile app development company specializing in iOS and Android development, with a strong focus on delivering tailored solutions and consulting services. Reviews indicate high client satisfaction, with over 90% of feedback highlighting their professionalism, technical expertise, and effective project management. Clients consistently commend Undabot's ability to deliver on time and their commitment to communication and problem-solving.
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$75,000+Undisclosed50 - 249Toronto, Canada
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See all 16 projectsClearbridge Mobile is a distinguished Mobile App Development company, excelling in iOS and Android Development. Clients consistently praise their ability to deliver high-quality applications, with 100% of reviews highlighting their effective project management and expertise in technical implementation. Their commitment to understanding client needs and adapting to challenges makes them a highly valued partner in Mobile Software Development.
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$5,000+$100 - $149 / hr10 - 49Atlanta, GA
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See all 5 projectsSolutionBuilt is a distinguished Mobile App Development company, specializing in iOS and Android applications. With a perfect satisfaction rate across reviews, clients commend their responsiveness, project management, and ability to meet deadlines on budget. Notably, 100% of reviewers highlighted SolutionBuilt's communication and customer-focused approach, reflecting their commitment to delivering tailored solutions.
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$5,000+$25 - $49 / hr10 - 49Jerusalem, Israel
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See all 3 projectsfatFish is a versatile digital solutions company specializing in UI/UX design, website development, and content management systems. Consistently praised for their effective project management and attentive communication, 100% of reviewers highlight their responsiveness and ability to transform design into functional platforms. Clients appreciate their patience and execution, although some suggest improvements in user experience skills.
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$25,000+$25 - $49 / hr50 - 249Yerevan, Armenia
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See all 13 projectsIMEA Systems | Software Development is a Mobile App Development company known for delivering robust mobile applications on both Android and iOS platforms. Their services have received highly positive feedback, with clients applauding their responsiveness and efficiency, particularly noting their ability to deliver functional solutions swiftly and effectively. One reviewer highlighted their straightforward approach, although suggesting a monthly review could be beneficial.
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$5,000+$25 - $49 / hr50 - 249
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See all 21 projectsGera-IT is a versatile application development company with strengths in Mobile App Development and related services. Their work is characterized by efficient project management and client-focused service, as highlighted by 100% positive feedback from reviewers. Notably, clients appreciate their ability to enhance technology solutions and provide valuable long-term advice.
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$25,000+$50 - $99 / hr50 - 249London, England
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See all 5 projectsDIGIMETA DEV LTD is a proficient Mobile App Development company that excels in transforming visions into fully functional apps across web, Android, and iOS platforms. With approximately 100% positive feedback, clients commend their high-quality work and responsive project management, highlighting their ability to align with client visions and budgets while maintaining a collaborative environment.
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$5,000+$25 - $49 / hr50 - 249
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See all 47 projectsIdeators is a mobile app development company with a reputation for delivering high-quality solutions for iOS and Android platforms. Reviews highlight their attention to detail and effective project management, resulting in improved conversion rates and enhanced user experiences. Approximately 90% of feedback is positive, emphasizing their ability to meet deadlines and deliver on client needs. However, clients suggest expanding globally and offering on-site support.
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$5,000+$100 - $149 / hr50 - 249Scottsdale, AZ
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See all 10 projectsExquisite Software is a mobile app development company known for its expertise in Mobile Application Development, particularly iOS and Android Development. Reviews are mixed, with approximately 67% positive feedback highlighting their professionalism, effective project management, and high-quality deliverables. However, 33% of reviewers reported negative experiences, citing issues with communication and project delays. Overall, Exquisite Software demonstrates strong capabilities but may encounter challenges in certain client engagements.
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List of the Top 15 Cross Platform Application Development Companies
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$25,000+$25 - $49 / hr50 - 249Agoura Hills, CA
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
50% Mobile App Development50% Hybrid & cross platform apps50% Other -
$5,000+$25 - $49 / hr250 - 999Jaipur, India
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
60% Mobile App Development60% Hybrid & cross platform apps40% Other -
$10,000+$50 - $99 / hr250 - 999Greenville, SC
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
60% Mobile App Development55% Hybrid & cross platform apps40% Other -
$25,000+$25 - $49 / hr50 - 249Warszawa, Poland
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
60% Mobile App Development50% Hybrid & cross platform apps40% Other -
$25,000+$50 - $99 / hr50 - 249Warszawa, Poland
Ability to deliver
39.6/40.020/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
80% Mobile App Development100% Hybrid & cross platform apps20% Other -
$25,000+$50 - $99 / hr50 - 249Hollywood, FL
Ability to deliver
39.5/40.020/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
60% Mobile App Development50% Hybrid & cross platform apps40% Other -
$10,000+$50 - $99 / hr50 - 249Montevideo, Uruguay
Ability to deliver
39.3/40.020/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
75% Mobile App Development80% Hybrid & cross platform apps25% Other -
$25,000+$50 - $99 / hr50 - 249Rzeszów, Poland
Ability to deliver
39.2/40.019.6/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
50% Mobile App Development50% Hybrid & cross platform apps50% Other -
$10,000+$25 - $49 / hr50 - 249Indore, India
Ability to deliver
39.1/40.019.6/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
60% Mobile App Development50% Hybrid & cross platform apps40% Other -
$25,000+$50 - $99 / hr50 - 249Buenos Aires, Argentina
Ability to deliver
38.9/40.019.2/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
50% Mobile App Development60% Hybrid & cross platform apps50% Other -
$25,000+$25 - $49 / hr250 - 999Irving, TX
Ability to deliver
39.9/40.020/20 Reviews10/10 Clients & Experience9.9/10 Market PresenceService focus
30% Mobile App Development30% Hybrid & cross platform apps70% Other -
$25,000+< $25 / hr250 - 999Gurugram, India
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
30% Mobile App Development30% Hybrid & cross platform apps70% Other -
$5,000+< $25 / hr50 - 249Jaipur, India
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
50% Mobile App Development40% Hybrid & cross platform apps50% Other -
$5,000+$25 - $49 / hr250 - 999Surry Hills, Australia
Ability to deliver
40/40.020/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
50% Mobile App Development25% Hybrid & cross platform apps50% 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 Development35% Hybrid & cross platform apps70% Other -
$1,000+< $25 / hr50 - 249Kolkata, India
Ability to deliver
38.3/40.019/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
50% Mobile App Development50% Hybrid & cross platform apps50% 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 Development80% Hybrid & cross platform apps75% Other -
$10,000+$50 - $99 / hr50 - 249Ząbki, Poland
Ability to deliver
37.9/40.020/20 Reviews9.3/10 Clients & Experience8.7/10 Market PresenceService focus
75% Mobile App Development100% Hybrid & cross platform apps25% Other -
Undisclosed$25 - $49 / hr250 - 999Dubai, United Arab Emirates
Ability to deliver
38.1/40.018.4/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
40% Mobile App Development30% Hybrid & cross platform apps60% Other -
$25,000+$50 - $99 / hr1,000 - 9,999Gliwice, Poland
Ability to deliver
38.7/40.019/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
20% Mobile App Development30% Hybrid & cross platform apps80% Other -
$10,000+$25 - $49 / hr250 - 999San Francisco, CA
Ability to deliver
40/40.020/20 Reviews10/10 Clients & Experience10/10 Market PresenceService focus
50% Mobile App Development20% Hybrid & cross platform apps50% Other -
$25,000+$50 - $99 / hr10 - 49London, England
Ability to deliver
37.2/40.018/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
70% Mobile App Development70% Hybrid & cross platform apps30% Other -
$10,000+$50 - $99 / hr50 - 249Denver, CO
Ability to deliver
39.7/40.020/20 Reviews10/10 Clients & Experience9.7/10 Market PresenceService focus
60% Mobile App Development30% Hybrid & cross platform apps40% Other -
$5,000+$25 - $49 / hr1,000 - 9,999Noida, India
Ability to deliver
37.1/40.020/20 Reviews10/10 Clients & Experience7.1/10 Market PresenceService focus
30% Mobile App Development25% Hybrid & cross platform apps70% Other -
$5,000+< $25 / hr50 - 249Indore, India
Ability to deliver
38.4/40.020/20 Reviews8.8/10 Clients & Experience9.6/10 Market PresenceService focus
55% Mobile App Development40% Hybrid & cross platform apps45% Other -
$50,000+$50 - $99 / hr1,000 - 9,999L'viv, Ukraine
Ability to deliver
38/40.018.2/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
21% Mobile App Development35% Hybrid & cross platform apps79% Other -
$25,000+$25 - $49 / hr50 - 249Miami, FL
Ability to deliver
36.9/40.017.6/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
60% Mobile App Development50% Hybrid & cross platform apps40% Other -
$10,000+$50 - $99 / hr50 - 249Montevideo, Uruguay
Ability to deliver
39.5/40.020/20 Reviews10/10 Clients & Experience9.5/10 Market PresenceService focus
30% Mobile App Development60% Hybrid & cross platform apps70% Other -
$5,000+$25 - $49 / hr50 - 249Jaipur, India
Ability to deliver
38.8/40.019.2/20 Reviews10/10 Clients & Experience9.6/10 Market PresenceService focus
50% Mobile App Development35% Hybrid & cross platform apps50% Other -
$50,000+$150 - $199 / hr10 - 49Chicago, IL
Ability to deliver
36.7/40.017.4/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
60% Mobile App Development60% Hybrid & cross platform apps40% Other
Latest Cross Platform Articles
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Cross-Platform App Development Agency FAQs
Leading agencies track key performance indicators such as install rate, user retention, session length, and revenue per user. They integrate analytics tools like Firebase, Mixpanel, or Amplitude to monitor these metrics and run A/B tests, allowing stakeholders to tie feature releases directly to business outcomes.
A cross-platform app development company designs, builds, tests, and maintains mobile applications that run smoothly on multiple operating systems—usually iOS and Android—with a single shared codebase. By leveraging frameworks such as Flutter, React Native, Xamarin, or Kotlin Multiplatform, these firms streamline development timelines, reduce maintenance overhead, and ensure a consistent user experience across devices. They also advise on app store compliance, security, and performance optimization.
Cross-platform app development companies tailor their services to help clients accomplish their unique goals and launch sophisticated apps. By partnering with these service providers, you can expect services such as:
- Technical consulting and product discovery
- UI/UX design tailored for multi-device compatibility
- Shared-codebase development (i.e., Flutter, React Native)
- Native module integration for device-specific features
- API and backend development or integration
- Quality assurance, automated testing, and CI/CD
- Post-launch support, updates, and mobile app development services such as analytics implementation and feature road-mapping
Budgets range widely based on several variables such as project complexity, feature set, and team size. Here’s a run through of average pricing based on cross-platform app development projects reviewed on Clutch:
- MVP or prototype: $25,000 – $60,000
- Mid-range consumer app: $60,000 – $150,000
- Enterprise-grade solution with integrations: $150,000 – $500,000+
Hourly rates for these service providers typically fall between $50 – $149. In addition, offshore teams often charge less, while top-tier U.S. agencies may exceed $200 per hour. Always request a detailed scope, delivery milestones, and maintenance costs up front.
- Match technical expertise to your stack (e.g., Flutter vs. React Native).
- Review case studies for similar industries or app types.
- Validate client testimonials and Clutch ratings.
- Assess communication style and project management tools.
- Compare total cost of ownership—including post-launch support—rather than just initial quotes.
Before committing to a long-term partnership, consider doing a trial run or a short test project. A discovery workshop or paid proof of concept is a low-risk way to evaluate fit before committing to a full build.
- Guarantees of unrealistically low budgets or launch dates
- Vague contracts without source-code ownership clauses
- Limited portfolio in cross platform mobile programming
- Poor responsiveness during the sales cycle
- Overreliance on generic templates instead of custom architecture
If a provider can’t explain their quality-assurance process or refuses to give you repository access, keep looking. Taking your time and being meticulous is better than wasting time, effort, and resources with the wrong partner.
- Which frameworks and programming languages do you specialize in?
- How do you handle OS-specific features within a shared codebase?
- What is your approach to testing on real devices versus emulators?
- Will I own the source code and IP upon project completion?
- How do you structure post-launch maintenance and updates?
- Can you provide references for projects similar in scope and industry?
Cross-platform teams deliver faster time-to-market and up to 30–40% cost savings because a single codebase powers multiple platforms. This unified approach simplifies future updates, ensures design consistency, and reduces the need for duplicate QA cycles. Native teams may still be preferable for GPU-intensive gaming or highly platform-specific experiences, but most business, productivity, and e-commerce apps see greater ROI with a cross-platform strategy.