Mobile App Development Services for iOS and Android

Kwebby's mobile app development services design and build iOS and Android apps for startups and small businesses, from first prototype to App Store launch. A simple app starts at $400, you get a fixed quote before work begins, and you test milestone previews on your own phone. You also own 100% of the code. This page covers what the service includes, what drives the price, how a project runs and how to choose between native and cross-platform.

Key Takeaways

• The $400 starting price covers a simple mobile app with up to 3 core screens on one platform, such as a catalog, booking request or information app.
• Other starting prices: cross-platform apps with logins and a backend from $2,999, MVPs from $3,499 and complex apps such as fintech products from $7,999.
• A simple app takes 1 to 4 weeks, an MVP 4 to 8 weeks, a React Native app 6 to 12 weeks and a complex app 10 to 20 weeks.
• Payment follows a 10/40/50 split: 10% to start, 40% at the midway milestone and 50% on delivery.
• Kwebby submits the app under your own developer accounts and hands over the source code, credentials and documentation.
• Apple charges $99 per year for its developer program and Google Play charges a one-time $25 fee, both paid by you.

What Kwebby's Mobile App Development Services Include

Kwebby covers the work from scoping to maintenance in one project, with six parts.

iOS and Android Apps

One React Native codebase ships to both app stores. When a feature needs deep device access, Kwebby adds native Swift or Kotlin code for that part.

UX and UI Design

Wireframes and clickable prototypes let you test the user flow before any code is written. Changing a screen at this stage costs far less than changing it after the build.

Backend and Admin Panel

Databases, user accounts, payments and an admin panel give your team control of the app. Kwebby builds them on Node.js, Firebase or Supabase.

App Store and Google Play Launch

Kwebby prepares store listings, screenshots, privacy details and review submissions for both stores.

Notifications and Analytics

Push notifications, crash reporting and event tracking show how people use the app and where it fails.

Updates After Launch

Maintenance plans cover OS updates, bug fixes and new features once the app is live.

What Custom Mobile App Development Covers

Custom mobile app development means Kwebby builds an app around your users and your business rules instead of adapting a template. You decide the features, the data you collect and the way customers pay. A typical project includes UX design, the mobile app, a backend with a database and an admin panel for your team.

Common examples include booking apps, loyalty apps, field service apps, marketplace apps and companion apps for an existing web platform. If your product needs a browser version too, see Kwebby's web app development. Each project starts with a scoped feature list and a fixed quote.

Native or Cross-Platform: Which Fits Your App?

Cross-platform apps use one codebase for iOS and Android, while native apps use Swift for iOS and Kotlin for Android. Kwebby builds most apps in React Native. React Native's own documentation says it renders to the platform's native UI components, so your app uses the same native platform APIs other apps do. One codebase lowers cost and keeps both apps in sync.

Native code fits apps that depend on heavy graphics, advanced Bluetooth work or new platform features on release day. A native build costs more because each platform needs its own code. Most business apps, booking apps and MVPs work well in React Native. Kwebby recommends one approach on your first call and explains the trade-offs in plain language. See the React Native service for details.

App Development Prices and Timelines

Every price below is a starting point, and your fixed quote confirms the exact number after a free call. See the pricing page for full ranges.

• Simple mobile app: from $400, up to 3 core screens on one platform
• Cross-platform app with user login and a managed backend: from $2,999 (React Native takes 6 to 12 weeks)
• MVP for startups: from $3,499, typically 4 to 8 weeks
• Complex apps with payments, real-time features or compliance needs: from $7,999, such as fintech apps at 10 to 20 weeks

How a Mobile App Project Works

A Kwebby app project runs in three steps.

1. Free call and fixed quote. You book a call during US hours, Monday to Friday, 9 AM to 6 PM ET. Kwebby lists your screens, features and integrations, then sends a fixed quote with milestones and a launch window.
2. Design and build in milestones. You pay 10% to start. Kwebby delivers the design, backend and app screens in stages, and you test each preview on your own phone before you approve it in the client portal. The 40% payment is due at the midway milestone.
3. Store launch and handover. Kwebby submits the app to the App Store and Google Play under your developer accounts. You pay the final 50% on delivery and receive the source code, credentials and documentation.

What Drives the Cost of an App

App cost depends on the number of screens, the features behind them and the systems the app connects to. A simple app with a login and a few content screens costs far less than a marketplace with payments, chat and live tracking.

You can lower the first-version cost by launching with the core user journey and adding features after real users test the app. Kwebby helps you sort features into launch and later lists during scoping.

Store Fees and App Review

You pay two store fees directly. Apple states that the Apple Developer Program costs 99 USD per membership year, and Google charges a one-time US$25 registration fee for a Play Console account. Because Kwebby submits the app under your own accounts, you keep the listing, the reviews and the credentials if you change developers.

Apple reports that, on average, 90% of submissions are reviewed in less than 24 hours. Plan for a buffer anyway, because a rejection means a fix and a resubmission.

How to Choose an App Development Company

The right app development company gives you a clear price, shows progress often and hands you the code. Ask every agency the same six questions before you sign:

• Is the quote fixed, or billed by the hour?
• Can I see working previews during the build?
• Do I own 100% of the source code at the end?
• Who submits the app to the App Store and Google Play, and under which account?
• What support do I get after launch?
• Can I reach the team during US business hours?

Kwebby answers these in writing in every quote. You see the price, the milestones and the handover list before you pay anything.

How to Prepare Your App Brief

A short brief gets a faster, more accurate quote. Before the free call:

• Name your user and their main job. One sentence is enough, such as "a customer books a visit in under a minute".
• List the screens you can picture. A napkin sketch works.
• Split features into launch and later. Everything in the launch list affects price and timeline.
• Name the systems it must connect to. Examples include payment providers, a CRM or an existing website.
• Share two or three apps you like. Say what you like about each.

Tech Kwebby Uses

Kwebby builds with React Native, Expo, TypeScript, Swift, Kotlin, Node.js, Firebase, Supabase, PostgreSQL, AWS, Stripe and Sentry. You do not need to know these names to hire Kwebby, and you receive the source code and credentials, so any developer can pick the app up later.

Final Thoughts

A good app partner gives you a fixed price, previews you can tap on your own phone and ownership of the code. Kwebby publishes its starting prices and its three-step process, so you can judge the fit before you talk to anyone. Write down your user, your screens and your launch features, then request a fixed quote. If you also need a site or a desktop tool, see all Kwebby services.