App Development Company: iOS, Android & Web
An app development company that ships useful products, not just code.
GrowFast is an app development company for startups and businesses that need iOS, Android or web apps people actually use. We scope the smallest version worth launching, build in short sprints you can test along the way, and ship with analytics and QA in place.
App Development services
Our app development services.
Each service has its own page with what's included, how it works and answers to common questions.
- 07.01iOS & Android App DevelopmentNative iOS and Android apps built in Swift and Kotlin, from product scoping to App Store and Google Play release.
- 07.02Cross-Platform App Development (React Native & Flutter)One codebase for iOS and Android with React Native or Flutter, so you launch on both platforms faster.
- 07.03Web App & PWA DevelopmentFast, secure web applications and installable PWAs built with Next.js, React and Node.
- 07.04MVP Development for StartupsA focused first version of your product, built to test demand with real users before you invest in the full build.
Sound familiar? Let's cross these off.
You have an app idea or an aging product, but quotes vary wildly, past builds ran over, and nobody can tell you what version one should actually include.
- Quotes for your app vary wildly
- A past build ran over time and budget
- Version one keeps growing before launch
- Your current app crashes or gets poor reviews
Our approach, point by point
How we approach mobile and web app development
Tap any point to read more.
01Choosing an app development company is mostly a decision about risk.
App projects rarely struggle because of code quality alone. They struggle because version one tried to do everything, the platform didn't match the audience, or nobody planned for what happens after launch. We start by agreeing what the app must prove, who it's for and which features are essential on day one, then move the rest into a roadmap. That scoping work is where most of a budget is protected.
02Then comes the platform decision.
Fully native iOS and Android app development in Swift and Kotlin makes sense when you need deep device features, demanding performance or the most platform-native feel. For many products, cross-platform development with React Native or Flutter delivers both stores from one codebase, which usually means a smaller team and faster releases. If your users mostly work at a desk, or you want to avoid app store friction, a web app or progressive web app may be the better first step. We recommend based on your users and roadmap, not on what we'd find most interesting to build.
03Design begins with user flows and a clickable prototype, so you can put the product in front of real users before engineering starts.
We build in short sprints with a working build at the end of each one, using TestFlight and Google Play testing tracks so stakeholders can try it on their own phones. Accessibility, offline behavior, security and privacy are planned from the start: Apple's privacy labels and Google Play's Data safety section both require you to disclose what data the app collects and how it's used, so that has to be known before submission, not guessed at the end.
04Launch is a milestone, not the finish.
We handle App Store and Google Play submission, then watch crash reports, store reviews and product analytics closely. Every release goes through structured testing with our quality assurance team, and yearly iOS and Android updates mean apps need maintenance even when no new features are planned. Analytics show which features people actually use, so the roadmap is driven by behavior rather than opinion.
05For startups, MVP development applies the same thinking under tighter constraints: the smallest product that tests your riskiest assumption with real users.
When an app has to connect to existing systems such as a CRM, payments or back-office tools, our custom solutions team builds the APIs and integrations behind it. Scope, platforms and timelines vary widely between projects, so see how our pricing works before we talk numbers.
How our app development works.
- 01Define the smallest version worth launching, with a clear feature priority list
- 02Choose native, cross-platform or web based on users, budget and roadmap
- 03Build in short sprints with a working build you can test every cycle
- 04Launch with analytics, crash reporting, QA and store submission handled
What's included in our app development
- Product scope, user flows & feature priorities
- UX/UI design & clickable prototype
- iOS, Android or web app build
- App Store & Google Play submission
- Analytics, crash reporting & handover documentation
Our app development process, step by step.
- 1ScopeGoals, users and the features version one needs.
- 2DesignUser flows and a prototype tested before code.
- 3BuildShort sprints with testable builds each cycle.
- 4LaunchStore submission, monitoring and the next release.
App development FAQs.
Pricing is custom and depends on platforms, the number of features and screens, integrations, design depth and whether ongoing maintenance is included. Our pricing page explains how projects are structured, and you get a written scope and estimate after discovery, before development starts.
It depends on scope. A focused MVP takes far less time than a full product with accounts, payments and integrations. Your proposal sets out milestones for scoping, design, build, testing and store submission, and we keep the timeline visible as priorities change.
Cross-platform frameworks like React Native and Flutter suit many business and consumer apps because one codebase serves both iOS and Android. Native development is the better choice when you rely heavily on device hardware, need maximum performance or want the most platform-specific experience. We recommend one after understanding your users and roadmap.
Yes. Code lives in your repository, and App Store, Google Play and cloud accounts are set up in your company's name. You get documentation so another team could continue the work if needed.
Yes. We prepare store listings, privacy disclosures and builds, and work through each store's review guidelines. Approval decisions belong to Apple and Google, so we plan time for review and any requested changes.
Yes, if you want us to. Ongoing support covers bug fixes, operating system and library updates, monitoring and new feature releases based on what users actually do in the app.
Yes. We work with US businesses remotely, schedule calls around Eastern, Central, Mountain and Pacific time, and run app projects for whichever states and cities you sell in, alongside clients worldwide.
An MVP (minimum viable product) is the smallest version of your app that real users can use. It lets you test the idea and learn before investing in every feature.
Yes. We start with a code and architecture review, fix what's urgent, and then continue development with clear documentation.
Yes. We handle user flows, clickable prototypes and the final UI design before development, so you can test the experience early.
It can. Offline support depends on what the app needs to do, and we plan it during scoping so data syncs safely when the connection returns.
Find out what App Development could do for your numbers.
Tell us about your goals and current setup. A strategist will reply within one business day with honest next steps.