Mobile app development
Mobile app development that puts your service in customers' pockets
Zevnotix Digital is a mobile app development agency for startups and service businesses in the UK and US. We design and build iOS and Android apps with the flows customers actually use — accounts, bookings, payments and dashboards — plus the admin side that runs them. Book a free consultation: we'll tell you whether you need a native app, a cross-platform app or a mobile-first web app first, and quote a fixed scope for the right one.
- Fixed scope and quote before work starts
- Weekly updates and demos
- You own the code, content and accounts
Who this is for
- Startups whose product genuinely needs to live on the phone: notifications, camera, location or offline use.
- Service businesses that want customers to book, pay and rebook from an app.
- Founders with a web product whose users keep asking for an app.
- Teams who need to know whether an app is worth it before spending on one.
What our mobile app development includes
Native vs cross-platform decision
A written recommendation based on your features, audience and budget — including when a mobile-first web app is the smarter first step.
User-friendly interface
Flows designed for thumbs and short attention, tested on real devices.
Accounts, bookings and payments
The core flows most service apps need, connected to a real backend.
Admin dashboard
A web dashboard for your team to manage users, content, bookings and payments.
Notifications
Push and email notifications for confirmations, reminders and re-engagement.
App Store and Google Play release
Store listings, review submissions and release management.
How an app project runs
- 1
Decide the platform
Native, cross-platform or web app first — decided on evidence, in writing.
- 2
Design the core flows
Clickable prototypes of the journeys that matter, reviewed on a phone.
- 3
Build backend and app together
Weekly builds you can install on your own device.
- 4
Test and release
Device testing, store submission and launch support.
- 5
Improve
Analytics on real usage drive the next release.
Technology and concepts
- iOS
- Android
- Cross-platform frameworks (e.g. React Native)
- Progressive web apps
- Node.js APIs
- PostgreSQL
- Stripe
- Push notifications
- App Store & Google Play release
How much does mobile app development cost?
Apps are quoted as a fixed price after a discovery call, once platforms, core flows and integrations are agreed in writing.
Supporting two platforms, offline behaviour and real-time features are what move the price most. If a mobile-first web app would test your idea for a fraction of the cost, we will tell you before you commit to native apps.
What affects the price
- iOS, Android or both
- Native vs cross-platform approach
- Offline use and device features (camera, location)
- Payments and bookings
- Admin dashboard scope
Mobile App Development: questions, answered
Do I need a native app or will a web app do?
If you need push notifications, deep device features or a home-screen presence that customers use weekly, an app is usually worth it. If customers use you occasionally, a fast mobile-first web app is cheaper and easier to find. We'll recommend one in writing.
Do you handle App Store and Google Play submission?
Yes — store listings, submissions and release management are part of the project.
What happens if something goes wrong?
Scope, price and milestones are agreed in writing before any work starts, so there is a fixed reference point if anything drifts. You get weekly progress updates and demos in plain English, which means problems surface in days rather than at the deadline. You own the code, content and accounts we create, so you are never locked in, and ongoing support can be included after launch.
Do you work with clients outside London and the UK?
Yes. We are based in London and work remotely with businesses across the UK, the US and internationally. Calls are scheduled to suit your time zone, and all project communication is written down so nothing depends on being in the same room.
Related services
- SaaS MVP & Web App Development
SaaS MVPs, web apps, client portals and dashboards — scoped to prove the idea.
- AI & Business Automation
Lead handling, quotes, CRM workflows and admin, automated with workflows and AI.
- Branding & Digital Identity
Logo, identity system, guidelines and social assets for credible, consistent branding.
Let’s talk
Ready to build something serious?
Tell us what you want to build. We’ll help you turn it into a clear, premium, and scalable digital experience.
- Direct access to the people who build
- Weekly progress updates in plain English
- You own everything we create