Our expert analysts researched and ranked the leading California 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 California

356 Companies - Rankings updated: March 31, 2026

DesignRush vets all agencies based on professional qualifications and verified customer feedback to help you choose confidently. Some featured agencies maintain paid sponsorships.

United States × California ×
  • Where Business Gets Success

    Where Business Gets Success

    Rainstream Technologies is a website design and development company based in India that has been providing professional services since 2014, with an extensive portfolio of over 500+ projects.  [... view Rainstreamweb profile ]
    Location
    Ontario, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
  • 4 Steps to Cloud 9

    4 Steps to Cloud 9

    iCode49 Technolabs stands out as a premier provider specializing in the meticulous development of cutting-edge iOS and Android mobile applications uniquely crafted for both startups and global brands. Our expertise lies in driving innovation within the ever-evolving mobile landscape, where we leverage our  [... view ICode49 Technolabs profile ]
    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $10,000 - $25,000
  • Crafting Websites, Creating Success!

    Crafting Websites, Creating Success!

    Invoxico Technologies is an adept company in web design and development, acknowledged for its proficiency in crafting customized digital solutions. Their expert team focuses on UI/UX design, web development, CMS development, eCommerce solutions, and mobile app development, and offers a complete range of  [... view Invoxico Technologies profile ]
    Location
    La Puente, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $1,000 - $10,000
  • Innovate, Code, Elevate Transforming Ideas into Reality.

    Innovate, Code, Elevate Transforming Ideas into Reality.

    H.R. Software Solutions Pvt. Ltd. is a leading IT company offering cutting-edge software development, web solutions, and digital marketing services. We specialize in ERP, CRM, mobile app development, and AI-driven solutions for businesses of all sizes. With a customer-centric approach, we deliver innovative  [... view H.R Software Solutions Pvt. Ltd. profile ]
    Location
    Ontario, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $10,000 - $25,000
  • Transform Your Business with Our End-to-End IT Solutions.

    Transform Your Business with Our End-to-End IT Solutions.

    Chipsy Information Technology Services Pvt Ltd. offers comprehensive IT solutions, including expert consulting, mobile app development (VitalBase is an ABDM-enabled hospital management information system), application development, school management systems, and DevOps services.  [... view Chipsy IT Services Pvt. Ltd. profile ]
    Location
    San Francisco, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $12/hr
  • Your Trusted IT Consulting Company for Business Success.

    Your Trusted IT Consulting Company for Business Success.

    TST Technology is an IT consulting company that offers services such as UI/UX design, web and mobile app development, software development, and SaaS product development. They have completed over 40 projects across 15+ industries.  [... view TST Technology profile ]
    Location
    Los Angeles, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $1,000 - $10,000

About The Author and Expert Reviewer

Selina Garcia has authored 500+ articles and edited 50+ published books in economics, law, and history. Her unique blend of experiences allows her to approach content creation from a well-rounded perspective. Currently, Selina applies her expertise to producing insightful articles on IT, software, and applications for DesignRush.

Former Development Director

Sergio is a technology leader with over six years of experience managing global teams and delivering projects across fintech, sportstech, and B2B platforms. At DesignRush, he drove product growth and development execution, building tools that speed up processes by 95% and cut costs by 35% while maintaining full uptime.