Custom app development for iOS and Android
Kwebby designs and builds iOS and Android apps for startups and small businesses, from first prototype to App Store launch. You get a fixed quote, milestone previews in your client portal and full ownership of the code.
Calls in US hours: Mon–Fri, 9 AM – 6 PM ET
Starting price
50% off first projectfrom$400
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.
- Typical timeline
- 6–14 weeks
- Payments
- 10% · 40% · 50%
- Code ownership
- 100% yours
- 1,200+ jobs done
- Cheapest industry rates
- Faster delivery
- You own 100% of the code
What you get
App development built for results
iOS and Android apps
One React Native codebase ships to both app stores, with native Swift or Kotlin code when a feature needs deep device access.
UX and UI design
Wireframes and clickable prototypes let you test the user flow before any code is written.
Backend and admin panel
Databases, user accounts, payments and an admin panel built 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 your app.
Updates after launch
Maintenance plans cover OS updates, bug fixes and new features once the app is live.
How it works
Three steps from call to launch
- 1
Free call and fixed quote
Book a free call during US hours (Mon–Fri, 9 AM – 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 milestones, 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.
Proof
1,200+ jobs done for clients across the US and worldwide
Ask for examples from your industry on the free call. We share live sites, app store links and references that match your project.
What custom app development covers
Custom 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. The finished app runs on iOS and Android and connects to the tools you already use.
A typical project includes UX design, the mobile app, a backend with a database and an admin panel for your team. Kwebby also sets up push notifications, analytics and crash reporting. These parts let you run the app as a business from day one.
Common examples include booking apps, loyalty apps, field service apps, marketplace apps and companion apps for an existing web platform. Each one starts with a scoped feature list and a fixed quote.
Mobile app development services from idea to store launch
Kwebby offers mobile app development services for every stage of a product. You can start with a prototype, launch a first version or add features to an app that already has users.
Each service has a clear deliverable, so you know what you receive at every milestone. You review the work in the client portal before you approve the next payment.
- Product scoping and feature prioritization
- UX wireframes and clickable prototypes
- Cross-platform React Native development
- Native iOS (Swift) and Android (Kotlin) modules
- Backend APIs, databases and admin panels
- App Store and Google Play submission
- Maintenance, OS updates and new features
Native or cross-platform: which fits your app
Cross-platform apps use one codebase for iOS and Android. Kwebby builds most cross-platform apps in React Native, which renders real native components and shares most of the code across both platforms. This approach lowers cost and keeps both apps in sync.
Native apps use Swift for iOS and Kotlin for Android. 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.
Kwebby recommends one approach on your first call and explains the trade-offs in plain language. Most business apps, booking apps and MVPs work well in React Native.
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 questions before you sign.
Kwebby answers these questions in writing in every quote. You see the price, the milestones and the handover list before you pay anything.
- 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?
- What support do I get after launch?
- Can I reach the team during US business hours?
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 login and a few content screens costs far less than a marketplace with payments, chat and live tracking.
Kwebby prices start at $400 for a simple app with up to 3 core screens on one platform. Cross-platform apps with user login and a managed backend start at $2,999, MVPs for startups start at $3,499, and complex apps such as fintech products start at $7,999. Your fixed quote lists the exact price before any work begins.
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.
Tech we use
Frequently asked questions
How much does it cost to build an app?
Kwebby builds simple mobile apps from $400 and cross-platform apps with logins and a backend from $2,999. MVPs for startups start at $3,499, and complex apps with payments, real-time features or compliance needs start at $7,999. You get a fixed quote after a free call.
How long does app development take?
Most apps take 6–14 weeks from the first call to store submission. A focused MVP can launch in 4–8 weeks. Store review usually adds a few days before the app goes live.
Will my app work on both iOS and Android?
Yes. Kwebby builds most apps in React Native, so one codebase runs on iPhones and Android phones. If your app needs a platform-specific feature, Kwebby adds native Swift or Kotlin code for that part.
Do I own the app's source code?
Yes. You own 100% of the code, designs and data. Kwebby hands over the repository, backend access and store credentials at launch.
Do you publish the app to the App Store and Google Play?
Yes. Kwebby prepares listings, screenshots and privacy details and submits the app under your own developer accounts. Apple charges $99 per year for its developer program, and Google Play charges a one-time $25 registration fee.
What happens after my app launches?
Kwebby fixes bugs during the support period listed in your quote. After that, maintenance plans cover OS updates, store policy changes, bug fixes and new features.
Do I need a technical background to work with Kwebby?
No. Kwebby explains every decision in plain language and shows progress through previews you can tap on your own phone. You focus on your users and your business rules.
Get a fixed quote in one business day
Tell us what you need. You get a fixed price, a milestone plan and a client portal to follow the work. Pay 10% to start, 40% at the midpoint and 50% on delivery.
Calls in US hours: Mon–Fri, 9 AM – 6 PM ET