Phoenix - Your AI AssistantDesign and develop a custom mobile app
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What you get with this Offer
reliable UK-based developer to bring your vision to life on iOS and Android?
I am Cornelius, a UK-based full-stack mobile app developer specialising in
React Native and Progressive Web Apps (PWA). I build cross-platform mobile
applications that run natively on both iOS and Android from a single
codebase — saving you time, money and the hassle of managing two separate
development projects.
Whether you need a brand new app built from scratch, an MVP to validate
your idea, or a business tool to replace a manual process, I deliver clean,
fast and professional mobile apps that your users will actually enjoy using.
What I build:
Business apps, booking and reservation apps, eCommerce mobile apps,
fitness and wellness apps, delivery and logistics apps, social apps,
on-demand service apps, internal staff tools, customer-facing portals,
dashboard apps and PWAs that work on any device without an app store.
My tech stack:
React Native, Progressive Web App (PWA), Firebase, REST API integration,
Push Notifications, Google Maps API, Stripe payments, JWT Authentication,
AsyncStorage, Redux, Expo and more.
My process:
Discovery — we define your app idea, target users and core features
Wireframe — I design the app screens for your approval before coding
Development — built in React Native, clean and well documented code
Testing — tested on iOS and Android simulators and real devices
Launch — submitted to App Store and Google Play or deployed as PWA
Handover — full code handover and post-launch support included
Why clients choose me:
One codebase means one developer, one timeline and one cost — not two.
I am UK-based with clear communication, professional delivery and a
genuine interest in making your app idea a success. I keep you updated
at every stage so there are never any surprises.
This listing starts at £500 for a focused single-feature MVP or starter
app. Complex apps with multiple features are quoted individually — message
me with your idea and I will give you an honest, detailed quote within
a few hours.
Message me before ordering, I am happy to review your idea, advise on
the best approach and provide a tailored quote for your project.
What the Freelancer needs to start the work
To get started on your mobile app right away, please provide:
App idea & purpose — what does the app do and who is it for?
Target platform — iOS only, Android only, or both?
Core features list — the key things the app must do
(e.g. user login, map, booking, payments, push notifications)
Design preferences — any apps you like the look or feel of
Brand assets — logo, colours and any existing branding
Backend requirement — do you need a server/database or is
it a standalone app?
Third-party integrations — payments (Stripe), maps, social
login, or any existing API you need connected
App Store accounts — do you have Apple Developer and Google
Play accounts set up? (Required for publishing)
Timeline — do you have a specific launch date in mind?
Budget range — for larger apps, sharing your budget helps
me propose the right scope