Our expert analysts researched and ranked the leading New York iPhone app development companies that build customer-centric applications that engage and convert users into paying customers. Use our practical tool to filter listings by budget, size and reviews and select the best partner for your business needs.

Best iOS App Development Agency In New York

2 Companies - Rankings updated: September 05, 2026

Every agency on DesignRush meets evaluation criteria around expertise and client feedback to empower informed choices. Some listings include paid partnerships.

iPhone
Legal
$50,000 & Up
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United States × New York × iPhone App Development × Legal × $50,000 & Up × Clear Filters

  • Azumo

    Verified Verified by the DesignRush team for authenticity and credibility.

    Build Intelligent Apps for Web, Mobile, Data, AI and Cloud

    Azumo has been building intelligent apps since 2016, offering expertise in custom native and cross-platform app development. It boasts a 150% client retention rate and a client portfolio of 100+ businesses, including Meta, Omnicon Media Group, and United Healthcare...

    Top Services:

    • AI Development
    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Big Data Analytics
    • Show more
    Location
    New York City, New York
    Number of Employees
    100 - 249
    Average Hourly Rate
    $55/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    9 Projects Listed

    Azumo Services

    • AI Development
    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Big Data Analytics
    • DevOps Consulting
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Discovery Channel
    • Meta
    • Zynga
    • Jostens
    • Assembled Brands
    • NGL
    • NCSoft
    • Twitter
    • Horoscope.com
    • Bento
    Data sourced from the agency's DesignRush profile

    Azumo Reviews & Testimonials

    • Michael S.
      Michael S. Director at Software Development Company
      5.0 ★

      Software Development Review from Michael S.

      We selected Azumo to develop our software. We transitioned from another development company, so Azumo was initially responsible for migrating our existing code and environments. We are currently still working with Azumo as our nearshore software development team on adding new items to our software.

    • Anonymous
      Anonymous CTO at Healthcare Company
      5.0 ★

      UI/UX Design Review from Anonymous

      Azumo helped us migrate our existing UIs into a new framework, creating reusable components and the infrastructure needed for future development. The developer they assigned became a seamless part of our team, always punctual, responsive, and a great fit overall.

    • Anonymous
      Anonymous VP Product & Engineering at Sales & Mktg Software Company
      5.0 ★

      Software Development Review from Anonymous

      Thanks to Azumo’s work, our product is now more scalable, optimized, and ready for a growing user base. Their team has managed the engagement effectively, keeping us updated and addressing any challenges along the way. We’ve appreciated their constant availability and proactive communication.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.8 4.8 (12)
    4.6 4.6 (20)

  • K-Optional Software, LLC

    Dont settle for off-the-shelf. Expertly crafted & custom-tailored software from the USA.

    K-Optional Software: where your success is our success. From secure solutions that scale to an uncompromising focus on return on investment, we're the company that delivers. Dont settle for off-the-shelf. Expertly crafted & custom-tailored software from the USA...

    Top Services:

    • Mobile App Development
    • Software Development
    • AI Development
    Location
    New York City, New York
    Number of Employees
    Under 49
    Average Hourly Rate
    $200/hr
    Minimal Budget
    $50,000 & Up

    K-Optional Software, LLC Services

    • Mobile App Development
    • Software Development
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Viapath Technologies
    • AllModular Systems
    • Assemplify
    • University of Arkansas
    • University of Texas Austin
    • Flowty
    • RepairDispatch
    Data sourced from the agency's DesignRush profile

    K-Optional Software, LLC Reviews & Testimonials

    • Michael Levy
      Michael Levy President at Flowty
      5.0 ★

      Software Development Review from Michael Levy

      Flowty is a blockchain-based platform providing various transaction services around NFTs. K-Optional wears many hats in support of Flowty including Front End, Back End, business strategy, SEO and more. The K-Optional team has been incredible to work with. They are proactive, supportive, smart, thoughtful and, most importantly, fit seamlessly into our team and company culture. To put it succinctly, we tried to hire them full-time...and then tried to buy their company to acqui-hire them. Some of their strengths include: reliability, responsiveness and creativity. There are many groups out there that can perform some version of the work we are looking for. There are not many groups that are responsive at all hours of the day, deliver consistently and able to present data-backed business strategies.

    • Jane Smarovozova
      Jane Smarovozova Creative Director at McSwain
      5.0 ★

      Software Development Review from Jane Smarovozova

      We collaborated with K-Optional to develop a custom inventory management dashboard tailored for real estate clients. We provided the creative vision and detailed designs, while their team focused on the software development, ensuring that every element was implemented perfectly. We worked hand-in-hand flawlessly, resulting in a sleek, user-friendly interface that not only looks great but functions seamlessly. The synergy between design and development allowed us to deliver a product that exceeded client expectations, combining aesthetics with powerful functionality.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.5 4.5 (2)

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