We’ve researched and ranked the best United States HTML5 mobile app development agencies that build sophisticated and high-quality apps that help brands drive more loyal customers and sales. Compare listings by past work, reviews, cost and size to pick the best fit for you.
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Flyaps
VerifiedVerified by the DesignRush team for authenticity and credibility.Award WinnerRecipient of a Best Design Award for outstanding work.AI & Cloud Software Engineering
Flyaps is an AI & cloud engineering company headquartered in New York, with delivery teams in Ukraine and Poland. For 12+ years, we've helped early-stage startups scale into unicorns and modernized legacy businesses into IT leaders...
Top Services:
- Software Development
- AI Development
- IT Services
- DevOps Consulting
- Cloud Consulting
- Show more
- Location
- New York City, New York
- Number of Employees
- Under 49
- Average Hourly Rate
- $49/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 9 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsFlyaps Services
Data sourced from the agency's DesignRush profileNetSpark IP & Telecom MyersBiz Net Yaana Airbyte Nextgen Clearing JOIN Relocate Shoelace Wireless
Flyaps Reviews & Testimonials

Python Django Review from Andrew Stetsenko
We partnered with Flyaps to build the GlossaryTech Chrome Extension from scratch, including the backend for tech terminology analysis. The goal was to help recruiters, sales professionals, and other non-technical specialists in IT quickly understand the technical terms they encounter every day.The first release shipped back in 2017, long before today's AI tools were available off the shelf. Flyaps built a custom tokenization layer on top of NLTK library to resolve the ambiguity problem - distinguishing "Go" the language from "go to the shop," or "Swift" the framework from the adjective, while also correctly recognizing multi-token terms like "Ruby on Rails" or "Amazon Web Services". It was a pragmatic, precise solution that made the extension genuinely usable from day one.The outcomes have validated that early bet. GlossaryTech now holds "Featured" status in the Chrome Web Store, has passed 25,000 downloads, and consistently serves 10,000+ weekly active users and 2,000+ daily active users. For a niche professional tool, that level of organic, sustained engagement is rare - and it traces directly back to the technical foundation Flyaps put in place.Beyond the engineering, what stood out was how Flyaps engaged with the product itself. They contributed to architecture decisions, flagged edge cases early, and treated scope conversations with honesty rather than upsell. Communication was straightforward throughout, deadlines were met, and the codebase has held up well as we've extended the product over time.I'd recommend Flyaps to anyone looking for a partner who combines solid engineering with genuine product thinking. They've been central to GlossaryTech's success and continue to be a team we trust.

Software Development Review from Dariia Ryzhova
Our collaboration with Flyaps has lasted for several major projects, of which I personally worked with them on two. I am very satisfied with the level of expertise (both technical and domain), the involvement and responsibility of the teams, and the quality of delivery. We successfully brought 2 major products to life together. Flyaps teams have diverse specializations, so I had the opportunity to attract consultants from different fields: software developers, including high-level architects, DevOps, QA, and business analysts.The teams have a modern technology stack and are experienced in Agile development. This allowed for smooth integration with internal teams and processes. It is also important to note that Flyaps provides technical consulting on demand, and this was very valuable service as well. Overall, I can recommend working with Flyaps as a reliable and high-quality partner.
ТОВ ХОТНАЙТС's Review Sourced from Google
Flyaps delivered outstanding results for our e-commerce store! They built a visually stunning and high-performing website that perfectly captures our brand. Since launching, our site speed has improved by over 60%, and we've seen a noticeable increase in our conversion rate. Their team's technical expertise is top-notch, and the new admin panel they created has made managing our operations so much easier. I am happy to recommend this team of professionals.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Yalantis
VerifiedVerified by the DesignRush team for authenticity and credibility.Full-cycle tech partner with deep expertise in IoT
We deliver cutting-edge, scalable, and fully functional IoT hardware and software products and ecosystems that help clients achieve their specific objectives...
Top Services:
- IoT
- Software Development
- Mobile App Development
- AI Development
- Big Data Analytics
- Show more
- Location
- California City, California
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 24 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsYalantis Services
Data sourced from the agency's DesignRush profileRAKwireless Toyota Tsusho KPMG Healthfully Orbis Systems Lifeworks Scholz Databank 123 Sourcing Truhoo
Yalantis Reviews & Testimonials

Fintech Review from Sergei Lishchenko
The exception team the client collaborated with brought in fresh ideas and innovative technologies previously unfamiliar to the client. For example, with Yalantis' guidance, the client's developers explore the Go language. The primary reason the client chose Yalantis is its strong organizational and project management skills. It's not just about the developers; Yalantis provides a comprehensive support framework, ensuring that a project manager is consistently present. (Verified via email)
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Software Development Review from Jason Jung
Yalantis functions as an integral scrum team, supporting the development teams of a real estate firm. It created renovation project management tools that encompass a web app, a mobile app, and a backend system. Thanks to Yalantis, the client expanded development capabilities and achieved key short-term goals. Its quick integration was pivotal in launching various projects. Beyond delivering top-notch work, Yalantis emphasizes a culture that prioritizes the customer's needs. (Verified via email)
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Outsourcing Review from Roy D
An IoT manufacturer teamed up with Yalantis to craft an application, enabling users to manage their devices more efficiently. Utilizing Node.js and basing the architecture on Circulus, Yalantis delivered commendable outcomes. It is responsive to any development challenges, offering swift resolutions. The client appreciates Yalantis' proactive stance, impressive technical expertise, and practical solution suggestions. (Verified via email)
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsPremium Mobile App Development and AI Solutions
We work with Startups and Businesses with enterprising new ideas. Delivering Premium Mobile app development and AI Powered Software solutions. Our agile development model ensures speed of delivery and scalability, while our AI-powered solutions enhance functionality and user experience...
Top Services:
- Mobile App Development
- AI Development
- Staff Augmentation
- Software Development
- Wearables
- Show more
- Location
- Fort Collins, Colorado
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 86 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsWDI Services
Data sourced from the agency's DesignRush profileDavid Costlow Dale Foster Rohan Raut Alex Scalia Sherina Rathore Paul Davys Zachary Lynch Anand Mehrotra - Sattva Connect Vikas Dixit - Angel Broking Ruchika Karla - Accessibily
WDI Reviews & Testimonials

Mobile App Development Review from Konrad Korobowicz
Thanks to Wdi's expertise and dedication, the music app achieved a 400% increase in downloads within the first month of launch, demonstrating significant progress and success.

Mobile App Development Review from Abdelrahman ALMULLA
wdi took the vision we had and turned it into something even better. They built this incredibly detailed app that lets users filter hotels based on things like airport transfers, car services, or other specific amenities. Travelers can also quickly spot deals or limited-time offers with just a glance.One of the coolest parts is how the app keeps guests updated when theyre checked into a hotel - whether it's on-site events or nearby activities, theyll get notifications straight to their phone. The feedback system they added is a game-changer. Guests can send questions or share thoughts right from their rooms, and they get notified the moment theres a response.

Mobile App Development Review from Aaron Birkby
We had many very clear outcomes and timelines based on our needs that were identified before the project began. They provided regular updates and progress reports via email and virtual meetings throughout the project. Typically in two-week sprints.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsTrusted IT Partner for SMBs & Enterprises Since 2001 | Dedicated Teams | Industry-Specific Solutions
Altoros is a 350+ person strong IT consulting and development group. For over 20 years, we've been assisting Global 2000 organizations in getting software products to market faster and reducing the cost of R&D experiments to enable stable business growth...
Top Services:
- Software Development
- Mobile App Development
- Web Design
- Web Development
- Staff Augmentation
- Show more
- Location
- Pleasanton, California
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 12 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAltoros Labs Services
Data sourced from the agency's DesignRush profileSiemens Toyota Hitachi Huawei Denso LikeFolio Dealflo iFit Walmart EQ Bank
Altoros Labs Reviews & Testimonials

Software Development Review from Daria Stolyar
We hired Altoros engineers as an essential extension of our client-facing internal teams. This was a tough decision because our reputation as a brand depends on the overall efficiency of our processes and we needed to make sure all risks are mitigated when it comes to delivery. Altoros has not let us down.Together with Altorosians we successfully deployed a number of tough and technologically complex projects on time. So our collaboration is certainly set to continue.

Software Development Review from Victoria Lewis
We enjoy working with our team, Roman Yurkin, Tatyana Kobzar, Svetlana Kalchanka and Tatiana Anop. They bring expertise and immense value to our business with each piece of work they complete. They are a major part of our business development and delivery.

Ruby on Rails Review from Greg Lipper
In my 30 years in the software business, I have never had as positive an experience with an outsourced development services provider as I have with Altoros. Each Altoros engineer we have worked with has been strong technically, estimated development times accurately, completed projects on time, and delivered code and projects with high quality. Beyond that, they have helped improve our thinking and approach with suggestions and ideas that were better than the spec of instructions we supplied.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsBusiness software with AI inside, built in Houston since 2004.
Espresso Moon is a Houston custom software company that builds AI-enabled business applications, mobile apps, and cloud platforms for B2B clients, and hosts and supports everything it delivers. We also own and operate GageList, a calibration management SaaS with AI built into the product...
Top Services:
- AI Development
- Software Development
- Mobile App Development
- Software Testing
- UI/UX Design
- Show more
- Location
- Spring, Texas
- Number of Employees
- Under 49
- Average Hourly Rate
- $150/hr
- Minimal Budget
- $25,000 - $50,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsEspresso Moon Services
Data sourced from the agency's DesignRush profileDistributionNOW Tesla Nucor Steel Everest Funeral Concierge Flexitallic Solvay Dental Stream Realty Wilson Perumal Neuhaus Academy SafeFleet
Espresso Moon Reviews & Testimonials
Bradley Collins's Review Sourced from Google
Working with the guys at Espresso Moon (Scott, Doug, Tim and Dwayne) was truly a great collaboration and experience. They didn't just throw a website together for us, they helped us to reinvent ourselves. They go out of their way to get to know you and your business to the fullest extent, and that is a quality that is not often seen. If I were to recommend a web design/hosting company to anyone, Espresso Moon would be the one and only name I give. Thank you for your service and support!
Meredyth Jones's Review Sourced from Google
I worked primarily with Scott, Tim and Doug to build a fairly complicated site: Paypal/credit card payments, video training modules, a graded quiz, and issuance of a completion certificate. They were the only website company that invited me to an in-person meeting and that was tremendously helpful in me understanding how they work and them understanding my goals. Large Animal Consulting & Education launched 2 days ago and the site is running smoothly. I'm very happy with the site they designed (they also designed my logos) and am looking forward to using them to support and add to the site down the road.
Caleb Schallert's Review Sourced from Google
Doug Wheeler is the owner of Espresso Moon and he has provided my small business excellent IT technical support for our website. His team helped me out by removing malicious code that was affecting my site right after the Heart Bleed epidemic last year. He got my site back up and running so i could continue business and save my online reputation. I would recommend Espresso Moon LLC to anyone in need of a new website or mobile application because they follow through with what they promise to do, on time and on budget. They are truly a pleasure to work with!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsWe transform your ideas into applications.
At Appstract, we specialize in crafting solutions that deliver unforgettable user experiences by leveraging innovation and adhering to best practices in mobile and web application development and design. Our mission is to ensure that every interaction with our products leaves a lasting impression, driving...
Top Services:
- Software Development
- Mobile App Development
- Product Design
- UI/UX Design
- Staff Augmentation
- Show more
- Location
- Coconut Creek, Florida
- Number of Employees
- Under 49
- Average Hourly Rate
- $30/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 4 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAppstract LLC Services
Data sourced from the agency's DesignRush profileAbInBev Droguería del Sud Prosegur Mostaza Temis Lostaló Xapo Bank Torc Syngenta Mundi Bull Market Brokers
Most trusted Technology Partner
Mysoft Heaven (BD) Ltd. is a Top Software Development Company with 15+ years of excellence. We specialize in enterprise-grade solutions like ERP, FinTech, e-Governance, and HRMS (HR Sheba). Our scalable SaaS platforms and Cyber Security solutions empower global organizations...
Top Services:
- Web Development
- Digital Marketing
- Mobile App Development
- Software Development
- Staff Augmentation
- Show more
- Location
- Miami, Florida
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $25,000 - $50,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsMysoft Heaven Services
Data sourced from the agency's DesignRush profileLand Reforms Board, Ministry of Land Bangladesh Agricultural Development Corporation Bangladesh Scout, Ministry of Education Bangladesh Bureau of Statistics (BBS) a2i & UNDP JICA+ NILG Bangladesh Trade and Tariff Commission, Segunbagic Alliance Group, Bangladesh Centre for the Rehabilitation of the Paralyzed JT Enterprises
Mysoft Heaven Reviews & Testimonials
Jahidul Islam's Review Sourced from Google
Coordination-focused role with cross-team interactionPros:Regular interaction with developers, clients, and management helps build strong communication and coordination skills.Cons:Managing multiple stakeholders at the same time can be challenging.Advice to Management:Clearer role boundaries would help reduce dependency-related delays.
SAHED HOSHEN's Review Sourced from Google
"Choosing Mysoft Heaven (BD) LTD was the best decision! They combined innovation with flawless execution, delivering our project on time and beyond our expectations. Amazing work!"
SM Nasim Abbas's Review Sourced from Google
"I've been using There software for my small business, and I can't imagine going back to the old way of doing things. It has simplified so many tasks, saving me hours of work each week. Their support team is always there to help if I need anything!"
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsValues by Convergence
We are an AI Consulting and Digital Transformation company that follows a collaborative and data-driven approach to deliver high-quality technology solutions for global enterprises...
Top Services:
- Web Design
- Mobile App Development
- Software Development
- Product Design
- Graphic Design
- Show more
- Location
- Lewes, Delaware
- Number of Employees
- 500 - 999
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $25,000 - $50,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAntino Labs Services
Data sourced from the agency's DesignRush profileOntic Rapido Hyderabad Metro Rail Krishify Hoppy
Antino Labs Reviews & Testimonials
sudeep kotari's Review Sourced from Google
Recently I cleared all the interview rounds in this company, unfortunately due to some personal reason didn't join. 2 technical round was very good, interviewers and HR Minnu was very friendly and nice. Definitely 5 star for treating employees and aspirants.
Jitendra Gupta's Review Sourced from Google
Antino labs's development is handled by experience developers. This gives best services to the client.This complets milestone before the time. I will say that it is satisfactory organization
Prakhar Pandey's Review Sourced from Google
I am working here as an android developer. In a small time I got a great exposure. For the freshesr who want to enhance our skills to next level then Antino Labs is a right organization.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Related Mobile App Development Specializations in the US
- Android
- Application Modernization
- Consumer
- Cross-Platform
- eCommerce
- Educational
- Enterprise
- Financial
- Fitness App Development
- Games
- Government
- Healthcare
- iPad
- iPhone
- Mobile App design
- Publishing
- React Native
- Small Businesses App Development
- Social Network Apps
- Sports App Development
- Startup
- Travel App Development
- Wearables
- Windows
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