Best US Cross-Platform App Development Companies

5 Companies - Rankings updated: September 04, 2026

Each agency undergoes DesignRush evaluation for professional expertise and genuine client satisfaction to assist your search. Some featured placements are paid.

United States × Cross-Platform Mobile App Development × Public Administration × Sort by: Avg Hourly Price: High to Low × Clear Filters
  • Marketing that Matters

    Creativity Justified is a full services creative and digital design agency providing branding, marketing and advertising solutions to brands and businesses throughout the United States...

    Top Services:

    • Branding
    • Graphic Design
    • Digital Services
    • Logo Design
    • Package Design
    • Show more
    Location
    Mandeville, Louisiana
    Number of Employees
    Under 49
    Average Hourly Rate
    $250/hr
    Minimal Budget
    $10,000 - $25,000

    Creativity Justified Services

    • Branding
    • Graphic Design
    • Digital Services
    • Logo Design
    • Package Design
    • Digital Marketing
    • Social Media Marketing
    • Advertising
    • Web Design
    • WordPress Website Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • D.R. Horton
    • Blue Cross Blue Shield of Louisiana
    • Keller Williams Realty
    • McDonald's
    • State of Louisiana
    • City of New Orleans
    • Montessori Academy of Slidell
    • Angels Care Home Health Agency
    Data sourced from the agency's DesignRush profile

    Creativity Justified Reviews & Testimonials

    • Joyce Tapley
      Joyce Tapley Review from Google
      5.0

      Joyce Tapley's Review Sourced from Google

      Our company has worked with Creativity Justified for going on 3 years. We have experienced a significant increase in views and activity on our newly designed website, as well greater interest in our services. The owner and her team maintain a high level of professionalism. They respond positively with any changes requested, and they provide great recommendations on options to profile our business. Consider Creativity Justified as your new business partner!

    • Jean Marc V
      Jean Marc V Review from Google
      5.0

      Jean Marc V's Review Sourced from Google

      Carrita and the Creativity Justified team have quickly become a reliable partner for supplementing our communication function when we need a quick turnaround for internal and external outreach. They are dependable, efficient and professional. Jean-Marc

    • Corey Doyle
      Corey Doyle Review from Google
      5.0

      Corey Doyle's Review Sourced from Google

      I've conducted business with Carrita and Creativity Justified multiple times. She consistently displays professionalism and provides a personal touch every time. It has been a pleasure to work with Creativity Justified.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Atlanta custom software, AI, product design, web and mobile development - 100% USA-based.

    Black Airplane turns consequential business problems into polished custom software. Our 30+ full-time, 100% USA-based strategists, product designers, and engineers deliver AI solutions, web platforms, and mobile apps used by more than 50 million people each month...

    Top Services:

    • Software Development
    • AI Development
    • UI/UX Design
    • Web Development
    • Mobile App Development
    • Show more
    Location
    Woodstock, Georgia
    Number of Employees
    Under 49
    Average Hourly Rate
    $250/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    3 Projects Listed

    Black Airplane Services

    • Software Development
    • AI Development
    • UI/UX Design
    • Web Development
    • Mobile App Development
    • Product Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Coca-Cola
    • Chick-fil-A
    • The Home Depot
    • IHG
    • The Weather Channel
    • McDonald's
    • SeatGeek
    • Gas South
    • StoneLoads
    • reTHINK Group
    Data sourced from the agency's DesignRush profile

    Black Airplane Reviews & Testimonials

    • Shayne Forsyth
      Shayne Forsyth Review from Google
      5.0

      Shayne Forsyth's Review Sourced from Google

      Black Airplane exceeded our expectations in delivering a top-tier website for TechnoMile. From the very beginning, their team demonstrated exceptional creativity and technical expertise. They approached the project with professionalism and clear communication, keeping us informed at every step. The end result is a visually stunning, high-performing site that reflects our identity and effectively supports our business goals. If you’re looking for a partner who can combine design excellence with virtually flawless execution, Black Airplane is the one to choose.

    • Ginger Jones
      Ginger Jones Review from Google
      5.0

      Ginger Jones's Review Sourced from Google

      Black Airplane has been exceptional to work with! Their team delivered a seamless Stripe integration with impressive speed, ensuring we met our tight deadline. A special shoutout to April, whose responsiveness and dedication have been nothing short of outstanding. She’s truly amazing!

    • Richard Klosa
      Richard Klosa Review from Google
      5.0

      Richard Klosa's Review Sourced from Google

      Top notch team working on a custom software development projects. I worked with Black Airplane (Brandon and David ) through an existing relationship they had with a company we purchased. Communication has been excellent. Both are very responsive and the resulting work has been excellent. Highly recommend.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • We are a software design & development company.

    We solve problems through purpose-built apps, websites, and platforms. We're experienced in UI/UX design, website development, desktop and mobile app development, APIs, generative AI solutions, and cloud services. Our UI design and software development experts work with your team to achieve your business...

    Top Services:

    • AI Development
    • Mobile App Development
    • Software Development
    • Web Design
    • UI/UX Design
    • Show more
    Location
    King of Prussia, Pennsylvania
    Number of Employees
    Under 49
    Average Hourly Rate
    $135/hr
    Minimal Budget
    $10,000 - $25,000

    Fynydd LLC Services

    • AI Development
    • Mobile App Development
    • Software Development
    • Web Design
    • UI/UX Design
    • Web Development
    • eCommerce Development
    • Cloud Consulting
    • IT Services
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • U.S. Bancorp
    • Red Hat Software
    • Pfizer
    • Saint-Gobain
    • U.S. Dept. of Justice
    • Heinz
    • The Vanguard Group
    • New Relic
    • Merck Sharp & Dohme
    • Philadelphia Scientific LLC
    Data sourced from the agency's DesignRush profile

    Fynydd LLC Reviews & Testimonials

    • David Sonn
      David Sonn Review from Google
      5.0

      David Sonn's Review Sourced from Google

      Fynydd is a team of very talented problem solvers, keenly skilled in delivering technology solutions. We flat out trust them. The applications, websites, and software they build are rock solid. And, they stand behind their work. In a world where the codebase could be faulty and you wouldn't even know it until it's far too late, Fynydd is the choice that brings peace of mind. #BeyondJustCoders

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Your SkunkWorks Dev Team

    Blood & Treasure provides consulting and technical support services in all areas of software development and team management. 20+ platforms developed. Over $80m raised from our MVPs. 10+ years in business serving enterprises (Citrix, Gap, Nike) and start-ups (Thnks, Altru, Dollaride)...

    Top Services:

    • Product Design
    • Graphic Design
    • Web Design
    • UI/UX Design
    • Web Development
    • Show more
    Location
    New York City, New York
    Number of Employees
    Under 49
    Average Hourly Rate
    $90/hr
    Minimal Budget
    $1,000 - $10,000

    Blood & Treasure, LLC Services

    • Product Design
    • Graphic Design
    • Web Design
    • UI/UX Design
    • Web Development
    • AI Development
    • Mobile App Development
    • Software Development
    • Cloud Consulting
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Citrix
    • Nike
    • GAP
    • Thnks
    • Millennium Strategies
    • Rep'd
    • Manhattan Chamber of Commerce
    • Dollaride
    • eModal
    • Liquid Talent
    Data sourced from the agency's DesignRush profile
  • Comprehensive Software Solutions, All in One Place!

    We deliver innovative software solutions that bring your passion projects to life, enabling them to ignite, grow, and thrive. Whether you need stunning web design or a sophisticated custom software system for your institution, we've got you covered...

    Top Services:

    • Web Development
    • WordPress Website Design
    • Software Development
    • Web Design
    • eCommerce Development
    • Show more
    Location
    New York City, New York
    Number of Employees
    Under 49
    Average Hourly Rate
    $45/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Element Media Services

    • Web Development
    • WordPress Website Design
    • Software Development
    • Web Design
    • eCommerce Development
    • UI/UX Design
    • SEO
    • Mobile App Development
    • Video Production
    • Graphic Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Bethlehem Municipality
    • Bethlehem University
    • John Paul II Organization
    • Bethlehem Chamber of Commerce
    • Ramallah Municipality
    • Al Quds - Bard College
    Data sourced from the agency's DesignRush profile

    Element Media Reviews & Testimonials

    • Monjed Jado
      Monjed Jado CEO at PNN Network
      5.0

      Web Development Review from Monjed Jado

      I had the pleasure of working with Element Media for a custom development service for PNN, a high traffic and secure news website. I must say that the experience was exceptional from start to finish. Their team provided a fully customized CMS that met the unique requirements of our website, and the benefits we received were numerous. Element Media addressed our concerns with website speed and caching, resulting in a faster and more efficient user experience. Additionally, the CMS was optimized for Google Search Results, increasing our website's visibility online. We were particularly impressed with the security features, which prevented DDOS attacks and other system risks from intruders. It provided us with peace of mind knowing that our website is safeguarded and secure. One of the standout features of the CMS was the user interface. It was modern, sleek, and user-friendly, enhancing the overall user experience for our audience. The customization provided by the CMS gave us flexibility in content creation, management, and delivery, allowing us to deliver a high-quality product to our audience. Throughout the project, Element Media demonstrated a high level of expertise, professionalism, and exceptional customer service. They were responsive to our needs and kept us informed throughout the development process. We couldn't have asked for a better partner for our custom development needs.

    • Naga Durgarao Baddhi
      Naga Durgarao Baddhi Review from Google
      5.0

      Naga Durgarao Baddhi's Review Sourced from Google

      I have dealt with Element team for a half year so far, and it was an outstanding experience! Their web development experience is top-notch and they provided their best efforts on my software.

    • Abigail Galván
      Abigail Galván Review from Google
      5.0

      Abigail Galván's Review Sourced from Google

      I've worked with Element Media for over five years now and am always satisfied with their professionalism and creativity.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews

Receive Free Proposals

For your project

1

Specify your budget, timeline and project requirements

2

Our experts curate a list of up to 5 most qualified candidate agencies

3

We connect you with them so you can choose the most suitable partner