Premier United States React Native Companies

• They have experience across native platforms like Android, iOS, and cross-platform platforms like React Native/Ionic, which gives flexibility depending on client budget, scope, or target markets. 
• Their agile development approach and commitment to collaboration and communication help accommodate changing requirements and iterative builds, useful for startups or fast-evolving products. 
• They offer flexible engagement models (fixed-price or time & material), which can suit small to medium businesses or startups looking for adaptability.

• Full-Service Mobile Expertise: They offer end-to-end services, including strategy, wireframing, UI/UX design, native (Swift/Kotlin) and cross-platform (Flutter/React Native) development, and App Store submission.
• Focus on Scalable Architecture: From the start, they build with scalability in mind, ensuring the app's backend and codebase can handle growth in users and features, preventing costly future rewrites.
• Agile & Transparent Process: Clients are integrated into the process through regular sprint reviews and demos, ensuring the project stays on track and aligns perfectly with the evolving vision. This transparency builds trust and manages expectations effectively.
• User-Centric Design Philosophy: They prioritize creating seamless, intuitive user interfaces (UI) and user experiences (UX) to ensure high user adoption and satisfaction, understanding that a great idea needs a great execution to succeed.
• Foundational Technical Strength: While a new entity, the team possesses strong foundational expertise in modern mobile technologies, cloud services (like Firebase and AWS), and API integrations.

• Strong track record of delivering user-friendly, secure, and scalable mobile applications using technologies like React Native, Flutter, native Android, and iOS development.
• Emphasis on speed and agility: they offer rapid-MVP builds, iterative feedback loops, and cross-functional teams for quicker launches. 
• High quality and reliability: with client ratings around 4.7+, strong client retention (90%), and frequent positive reviews. 
• Diverse domain experience (eCommerce, healthcare, SaaS, logistics, etc.), helping them handle different compliance, performance, and UX challenges. 
• Full support through the life cycle of an app: from discovery and strategy, through design, development, QA/testing, launch, and post-launch maintenance.

One of their featured projects is Built By Determination, a fitness app developed for the US market. The app includes personalized workouts, nutrition tracking, progress tracking, and a store feature (“GYM store”). TechnBrains built it using React Native and .NET, with hosting on Azure. The client highlighted that the team exceeded requirements, maintained good communication, and delivered features with attention to detail. 

• They offer a wide tech stack like React Native, Flutter, Kotlin, Swift, Java and support both native and hybrid app development. 
• Their global delivery model like UK HQ, development centre in India, multiple branches gives scalability and cost flexibility while maintaining London-based client liaison. 
• Their promotional material emphasises user-first design “seamless user experiences”, strong backend integration and testing regimes. 
• If you need a mobile app as part of a broader platform web, e-commerce, back-office they appear capable to handle full lifecycle rather than just app UI.

While a highly detailed metric-based case study is not publicly highlighted, their Clutch‐profile lists a “Mobile App Development Package” offering with examples:

“Android App Development for Cityfurnish Furniture” among others. 

This suggests they have delivered mobile apps for retail/consumer clients globally.

• Expertise in Flutter and React Native.
• Focus on usability, speed, and long-term performance.
• Integrates apps with custom APIs and backend systems.
• Offers end-to-end mobile lifecycle services, from design to deployment.
• Experienced in multi-sector app delivery, including retail and enterprise mobility.

• Strong specialisation in mobile, making them a reliable partner for app-first business models.
• Experience with native and cross-platform frameworks gives flexibility for cost, timeline and feature depth.
• Proven capability with MVPs and rapid prototyping for fast go-to-market plans.
• Good communication and responsiveness, highlighted consistently in client reviews.

"Their ability to handle technical situations is amazing. They worked around strict requirements and delivered exactly what I needed.” - Theo Engler, CTO (Jan 2025, Capterra)

• Mobile is their primary specialisation, meaning deeper experience and stronger delivery frameworks.
• Proficiency in both native and cross-platform technologies provides flexibility for cost, speed, and scalability.
• Their engineering process supports MVP development as well as enterprise-grade apps with backend integrations.
• Suitable for startups, SMBs, and enterprises needing feature-rich, modern mobile solutions.

• Support for cross-platform development ensures a wider audience reach using shared codebases. 
• End-to-end services from ideation and design through deployment and maintenance reduce vendor hand-offs. 
• Global presence gives strong oversight for domestic clients looking for responsive project management.
• Experience across industries means greater adaptability to different mobile-app use-cases. 

• They bring a strong track record in mobile with well-documented processes from ideation through deployment and maintenance. 
• Their mobile app capability spans native and cross-platform, allowing clients to weigh cost, speed, and quality trade-offs. 
• They support startups through large enterprises and have built dozens of apps across multiple industries, offering a breadth of experience and domain insight.

Client: LOCCI (civic-engagement mobile platform) - EitBiz was engaged to rebuild the mobile application for LOCCI, overcoming issues of unoptimized and redundant code, and enabling integration of modular themes to support scalability. 

Approach: EitBiz implemented a modular architecture using React Native, TypeScript, Redux, and Material UI, streamlining performance and enabling feature expansion. 

Outcome: The redesigned app achieved improved maintainability, smoother user experience, and easier rollout of future themes/modules (specific quantitative metrics were not published). Feedback:

From client reviews, EitBiz is praised for strong communication and delivery of apps that “look and function at the highest level”.

• They deliver mobile applications for both iOS and Android platforms, giving you multi-platform reach. 
• They emphasise cross-platform or shared-code solutions, which can reduce time and cost. 
• They explicitly mention strong UX and user-friendly design in their mobile apps, ensuring customer adoption focus. 
• Their US-based presence West Palm Beach, Florida may provide easier communication and local accountability. 
• They integrate mobile apps with business goals, rather than just building “an app” supporting usage, retention and value.