Mobile app development for iOS & Android
Neptunes Tech designs and builds custom mobile apps for startups and growing businesses — from a first MVP to a production app ready to scale. One team handles UX design, cross-platform development, the backend and APIs, and the launch on the App Store and Google Play.
- iOS + Android from one codebase
- Fixed, transparent quotes
- Free project consultation
Mobile apps we build
Whether you are validating a new idea or giving your customers and staff a better way to work, we build apps around real business goals.
Cross-platform apps
One React Native codebase for iOS and Android, so you launch on both stores faster and maintain a single product.
Marketplace & booking apps
Listings, search, bookings, payments and in-app messaging for marketplaces and service businesses.
Customer & loyalty apps
Branded apps with accounts, push notifications and offers that keep customers coming back.
Internal & field-team apps
Apps for staff on the move: job lists, checklists, photo capture, GPS and offline mode that syncs later.
AI-powered features
Chat assistants, smart search, recommendations and document or image processing built into your app.
Backends, APIs & admin panels
Secure APIs, databases, authentication and a web dashboard to manage users and content.
What this looks like in practice
The kinds of app we are most often asked to build.
The booking that should not need a phone call
Customers call to check availability and book. An app shows real slots, takes the payment and sends the reminder — and your phone stops ringing for things software can do.
The team working off paper
Field staff carry job sheets and photograph them later. An app captures jobs, checklists, photos and signatures on site, works offline in a basement, and syncs when signal returns.
The loyalty scheme on a card
Stamps on cardboard nobody keeps. An app holds the balance, pushes the offer at the right moment and tells you which offers actually bring people back.
The web product customers want on their phone
You have a working web app and users keep asking for the app version. We build the mobile experience on the same backend rather than a second product.
What you get
Every mobile app development project includes the following, and the quote says so before you commit.
- One React Native codebase producing both iOS and Android apps
- UI/UX design validated as a clickable prototype before development
- Test builds on your own device throughout the project
- Backend, APIs, database and a web admin panel
- Push notifications, analytics and crash reporting
- App Store and Google Play submission, under your own developer accounts
- Post-launch support for OS updates, fixes and new features
Why build your app with Neptunes Tech
A mobile app is only as good as the product thinking and the backend behind it. We cover both, so you get one accountable partner from idea to launch.
- Design, mobile, backend and cloud handled by one team — no hand-offs between agencies
- Cross-platform development that saves cost and time while keeping a native feel
- Regular demos and test builds on your own phone throughout development
- Support after launch for OS updates, fixes and new features
Our mobile app development process
Discovery & scope
We map your users, core features and must-haves for version one, then send a fixed quote and timeline.
UX & UI design
Clickable prototypes of the key screens so you can validate the flow before development starts.
Build & test
Agile sprints with test builds on real iOS and Android devices, plus the backend and admin panel.
Launch & grow
App Store and Google Play submission, monitoring and ongoing improvements after release.
Tools and technologies
Mobile App Development pricing
Every project gets a fixed quote after a free consultation. Typical starting points:
Growth
A custom mobile app with tailored UI/UX, backend APIs, database and admin dashboard.
Scale
A full cross-platform app with advanced AI features, DevOps and scalable, secure infrastructure.
Mobile App Development FAQs
How much does it cost to build a mobile app?
Custom mobile apps with a backend and admin dashboard start from $4,000. Full cross-platform products with advanced features and infrastructure start from $9,000. After a free call we send a fixed quote, so you know the cost before work begins.
How long does mobile app development take?
A focused custom app typically takes about 4–6 weeks. Larger apps are planned in phases so you can launch early and keep adding features.
Do you build native or cross-platform apps?
We mainly build cross-platform apps with React Native, which gives you iOS and Android apps from one codebase with a native look and feel. That usually lowers cost and makes updates faster. If your app needs something cross-platform can’t do well, we will tell you during discovery.
Will you publish the app to the App Store and Google Play?
Yes. We prepare the builds, store listings and review requirements and handle the submission. We recommend publishing under your own developer accounts so the listings stay in your control.
Can you add AI features to my app?
Yes. We integrate AI features such as chat assistants, smart search, recommendations and document or image processing, connected securely through your backend.
Do you support the app after launch?
Yes. The Growth package includes 90 days of priority support, and Scale includes priority support with an SLA. Ongoing maintenance for OS updates, fixes and new features is available after that.
Let's start a conversation
Whether you have a fully scoped project or just an early idea, we'd love to hear from you. Reach out and we'll get back within one business day.