We are San Francisco's go-to team for custom iOS, Android and cross-platform mobile apps. From concept to App Store—we build it, beautifully.
From fintech to health tech, e-commerce to social platforms — our SF-based team delivers mobile experiences your users love.
Swift and Objective-C native apps built to Apple's highest standards. App Store optimized and performance-tuned.
Kotlin-powered Android apps that shine on every device. Google Play-ready with stellar performance.
One codebase, two platforms. React Native and Flutter apps that look and feel completely native.
Pixel-perfect interfaces designed around real user journeys. Wireframes to high-fidelity prototypes.
Scalable cloud backends, REST APIs, real-time features, and database architecture to power your app.
Ongoing support, OS updates, bug fixes and feature additions to keep your app competitive.
Founded in the heart of the Bay Area, Rapid Developers has been turning big ideas into polished mobile experiences since day one. We work with startups, growth-stage companies, and enterprises right here in San Francisco.
Our team of engineers, designers, and strategists lives and breathes mobile. We don't just build apps — we craft digital products that users can't put down.
MVP to market in weeks, not months.
Rigorous QA on every release.
SF-based, face-to-face available.
Apps built to scale with your business.
We're your neighbors — meet us in person at our Castro St office anytime.
Agile sprints and rapid iterations get your app live faster than competitors.
No hidden fees. Fixed-price or time-and-material — your choice.
A dedicated PM and direct Slack access — not a ticket queue.
San Francisco founders and product teams trust Rapid Developers to ship great mobile experiences.
Rapid Developers transformed our idea into a polished iOS app in under 10 weeks. The team's communication and craftsmanship is unmatched in the SF market.
From wireframes to App Store approval, the process was seamless. Our React Native app runs perfectly on both iOS and Android. Highly recommend!
We needed a fintech app with serious security. Rapid Developers delivered on time, on budget, with zero compromise on quality. True SF pros.
We craft native iOS applications using Swift and SwiftUI, optimized for iPhone and iPad. Our apps follow Apple's Human Interface Guidelines and are App Store ready from day one.
Modern Kotlin-based Android apps built with Jetpack Compose for beautiful, responsive UIs. We test across a wide range of devices to ensure a consistent experience on Google Play.
Maximize ROI with a single codebase that delivers native-like performance on both iOS and Android using React Native or Flutter — ideal for startups moving fast.
User-centered design from research to high-fidelity prototypes. We validate with real users before writing a line of code, saving time and development costs.
Scalable APIs, real-time databases, authentication, push notifications, and cloud infrastructure on AWS, GCP or Firebase — we build the engine that powers your app.
Manual and automated testing across devices, screen sizes and OS versions. We catch bugs before your users do — every release goes through our rigorous QA process.
Launch with a competitive edge. We optimize your App Store and Google Play listings for maximum visibility and downloads from day one.
Post-launch care packages including OS compatibility updates, crash monitoring, performance tuning, and feature additions to keep your app competitive.
Bring intelligence to your app with on-device ML, ChatGPT integrations, recommendation engines, image recognition and natural language processing features.
A proven agile process refined over 8+ years and 150+ app launches across San Francisco and beyond.
Deep-dive into your goals, audience and competitive landscape.
Wireframes, user flows, and high-fidelity UI prototypes.
Agile sprints with weekly demos and full transparency.
Rigorous testing across devices, OSes and edge cases.
App Store submission, analytics setup and ongoing support.
Designers, devs, QA and PMs under one roof. No outsourcing, no handoffs.
Weekly sprints, daily standups, and live Jira boards — you always know the status.
Full NDA and IP assignment. Your code, your product, your IP — always.
150+ apps launched with a 98% client satisfaction rate across every industry.
Rapid Developers was founded in San Francisco with one mission: to help bold ideas become beautiful mobile apps — fast. Nestled in the Castro district, we've spent over 8 years partnering with founders, enterprises, and everything in between.
We believe that great mobile software starts with deep listening. Before we write a single line of code, we immerse ourselves in your users' world — their frustrations, their habits, their expectations.
The result? Apps that don't just work. Apps that users love, recommend, and return to every day.
Visit us at 557 Castro St.
8+ years of mobile excellence.
SF roots, worldwide reach.
Designers, devs & strategists.
We move fast — but never at the expense of quality. Rapid delivery and clean code aren't opposites. We prove it every sprint.
Open communication, honest timelines, and real-time project visibility. No surprises — just clear collaboration from kickoff to launch.
Every feature, every flow, every pixel — designed around the end user. If it doesn't serve the user, it doesn't ship.
iOS, Android and cross-platform apps shipped across 12+ industries.
Established 2016 in San Francisco's Castro neighborhood.
Our clients come back — and they send their friends.
Engineers, designers, QA specialists and product strategists.
The Rapid Developers team felt like an extension of our own. Their SF location meant we could pop in for design reviews — something remote shops can't offer.
Three other firms quoted us 9 months. Rapid Developers launched our MVP in 11 weeks without cutting corners. Worth every penny.
Our Android app hit 10,000 downloads in the first month. The UX they designed is simply exceptional — users keep telling us how intuitive it is.
Whether you have a fully formed spec or just a napkin sketch — we'd love to hear about your project. Reach out any way that works for you.
We typically respond within 1 business day.