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Mobile App Development
Cross-Platform Mobile Apps: iOS + Android from One Codebase
Native Swift/Kotlin or cross-platform React Native/Flutter. We build mobile apps that scale, work offline, and handle real users—tested on 15+ devices before launch.
✓ iOS + Android · ✓ 6-10 weeks typical · ✓ App Store submission included
Who This Is For
✓ Perfect fit if you need:
- • iOS + Android apps from one codebase (cost-effective)
- • Mobile-first product (vs. responsive web app)
- • Offline functionality or device-specific features
- • App Store & Google Play submission support
- • Push notifications, geolocation, camera access
⚠️ Consider web app instead if:
- • Users access it from desktop browsers primarily
- • You need faster updates (no app store approval)
- • Budget is tight (web apps are typically 30% cheaper)
- • You don't need device-specific features
Native vs Cross-Platform
React Native vs Flutter vs Native: Which Should You Choose?
We recommend the right platform during scoping based on your needs, timeline, and budget.
Our recommendation: Start with React Native (most popular, huge ecosystem) or Flutter (excellent for custom UI). Reserve native development for apps requiring AR, advanced camera features, or platform-specific capabilities.
Investment & Timeline
Mobile App Timeline & Pricing
Fixed-price quotes after scoping. Typical ranges shown below.
Typical Timeline
6-10 weeksFrom design to App Store submission
Typical Investment
$15K - $40KCross-platform (React Native / Flutter)
App Store Submission
IncludedWe handle iOS + Android submission
Timeline Breakdown
- • Week 1-2: UI/UX design + API planning
- • Week 3-6: Core features development + testing
- • Week 7-8: Device testing (15+ devices), bug fixes
- • Week 9: App Store submission (iOS review: 1-3 days)
- • Week 10: Google Play submission (review: 1 day)
Native apps (Swift + Kotlin) add 4-6 weeks due to dual codebases.
What Affects Price?
- • Complexity: Simple (1-2 screens) vs complex (10+ screens)
- • Backend: API-only vs full backend + database
- • Integrations: Stripe, push notifications, maps, camera
- • Platform: Cross-platform ($15K-$40K) vs Native ($30K-$80K)
- • Design: Template-based vs custom UI/UX
Get accurate quote: Book free scoping call to discuss your specific needs.
What changes
Apps people keep on their phones.
iOS, Android, or both. The approach is chosen for the product, then submitted to the stores.
01
An iOS app, an Android app, or both
02
Native or cross-platform, chosen in discovery
03
Submitted to the stores, then updated for new OS versions
Is this you?
When this is the right service
A product whose users are on a phone, including the choice between one codebase and two.
- You need an iOS app, an Android app, or both.
- The app has to survive real use, including store submission.
- You are choosing between native and cross-platform.
- The app will need updates when the operating system changes.
Good fit
- People use the product on a phone.
- App Store or Google Play submission is in scope.
- You can decide native or cross-platform in discovery.
Not a fit
- A desktop-only tool with no mobile use.
- A website that does not need an install. That is the web service.
- A promise of store approval before the stores review the build.
Services
What we build
Swift, Kotlin, Flutter and React Native are the approaches. Which one is chosen during discovery.
iOS apps
Native iOS with Swift when the product needs the platform directly.
Android apps
Native Android with Kotlin when the product needs the platform directly.
Cross-platform apps
Flutter or React Native when one codebase should serve both stores.
App-store submission
We prepare and submit the scoped apps. The stores decide approval.
Offline, payments and device features
Included when the scope says so. The payment approach is chosen during scoping.
OS updates
Updates for new iOS and Android versions, scoped and quoted. Ongoing updates can move to Continuous Product Engineering.
Native or cross-platform?
Choose the approach that fits your product
Compared on speed to market, performance, device features and cost. Cost is quoted during scoping. No prices are listed here.
| Swift and Kotlin | Flutter | React Native | |
|---|---|---|---|
| Speed to market | Two native codebases, so the first release is the longer path. | One codebase for iOS and Android. | One codebase for iOS and Android. |
| Performance | Direct platform UI and APIs. | Enough for most product screens. Native code when a device feature needs it. | Enough for most product screens. Native code when a device feature needs it. |
| Device features | iOS and Android APIs directly. | Through Flutter, plus native code when the framework does not cover the feature. | Through React Native, plus native code when the framework does not cover the feature. |
| Cost | Quoted during scoping. Two codebases to build and keep current. | Quoted during scoping. One codebase, plus native work only where the scope needs it. | Quoted during scoping. One codebase, plus native work only where the scope needs it. |
How it works
From discovery to the stores
Submission is part of the process. Approval is the store's decision.
- 01
Discovery
We choose native or cross-platform, and what offline, payments or device features are in scope.
You get: a written scope and a fixed price for that release.
- 02
Design
We design the screens for phone use.
You get: those screens before the build.
- 03
Build
We build the scoped apps in the approach discovery chose.
You get: builds you can install and try.
- 04
App-store submission
We prepare and submit the scoped apps to the App Store and Google Play.
You get: the submission. The stores decide whether to approve it.
- 05
Updates for new OS versions
We scope updates when iOS or Android changes, if you want us to do them.
You get: a quoted update, or a handover so your team can ship it.
Built for production
How we make it dependable
Store listing is not the same as a dependable app. These are the engineering checks.
Testing
Tests on the flows the scope says must work, on the devices that scope names.
Code review
A senior engineer reviews every change, including AI-generated code.
Security checks
Sign-in, data on the device, and payments if they are in scope.
Monitoring
A way to see crashes after release. The tool is chosen during scoping.
Documentation
How to build, sign and submit the apps.
Handover
Code, repositories and store listings stay in your name.
Technology
Tools we use, chosen per project
These four are the mobile approaches. Which project uses which is decided in discovery.
Proof
Work in this area
Industry and platform only. Client names stay private. Each study is published on Work when it is written.
K–12 learning platform
Mobile-first for schools; offline-first sync when connectivity returns.
See workGrocery delivery
Web, iOS, and React Native for on-demand commerce at peak volume.
See workProperty inspections
Cross-platform apps for field teams—camera, offline notes, and sync (team experience).
See workWays to work together
How to work with us
A defined app release is a fixed-price project. OS updates after that are quoted separately.
Recommended
Fixed-price project
Best for a defined release, including store submission for the apps in scope.
How it works Discovery ends in a written scope and a fixed price for that release. No price is listed on this page.
FAQ
Common questions
Store approval, offline behaviour and payments are scoped. They are not promises on this page.
We choose during discovery. Swift and Kotlin when you need two native apps and direct platform access. Flutter or React Native when one codebase should serve iOS and Android. Cost is quoted during scoping. The comparison on this page is the guide.
We prepare the release and submit it to the App Store and Google Play for the apps in scope. The stores decide approval. We do not promise they will accept a build.
When the scope includes it. Offline behaviour is a discovery decision, not a default on every app.
When the product needs them, they are in the scope. The payment approach is chosen during scoping. No vendor is named here.
The process includes updates for new OS versions. If you want that to continue after launch, it sits in Continuous Product Engineering. What each update includes is quoted.